Updated December 23,
This page contains the best microwave
tools you can find on the Internet that you can download for free!
Does the IEEE provide
such a page? Do microwave
trade journals? Don't bet on it!
New for December 2013: we have an update to the S-parameter Utilities spreadsheet, thanks to Ishan.
Also new for December 2013, we have further analyses of resistive splitters thanks to Andy.
We at TEGAM were designing an amplifier test bench and had occasion to look on your site for some splitter design input. I was intrigued with the approach taken by Adams at www.microwaves101.com/encyclopedia/Resistive_splitter1.cfm but really wanted to be able to control the attenuation to both output ports. After a bit of fiddling, I came up with a two output port splitter design calculator that lets you set the attenuation to each port (within practical limits). The derivation and calculator are attached in the files names, “Two Output Four DOF”.
In a further step, our design needed a splitter with two equal outputs and a third monitoring output with some “nice” ratio to the others. That was a relatively simple step and is attached as “Three Output Four DOF”.
Download a zip file containing Andy's analyses
New for October 2013: this download is a MatLab program that calculates transmission line properties, including microstrip, coupled stripline and coplanar lines. It was contributed by Lakshmi from NITT. You can learn how it works on this page. Thanks again!
Download the MatLab T-line calculator (in the form of a zip file)
New for August 2013: Here's an airbridge inductance calculator in Excel, contributed by Matt. The math appears on this page. Note that Matt change to units to more-relevant picoHenries. Thanks!
Download the airbridge inductance calculator
New for May 2013: How many times have you had to convert electrical degrees to length or delay? Here's a simple spreadsheet that does the calculation three ways. If you are designing a time delay unit, you know what we are talking about... while you are thinking about this, commit the following to memory so you can do the calculation in your head: 300mm (~one foot) is one nanosecond delay in free space, and is one wavelength (360 degrees) at 1 GHz.
Download the delay-length-phase calculator
New for March 2013: Here is a poster on the topic of Women in Microwaves, that was prepared by Dr. S. Raghavan and Prof. S. Suganthi. Check out NITT's Microwaves101 page for more information on microwave education in India.
Download Women in Microwaves Poster
New for December 2012: Read all about the future by grabbing a copy of GLOBAL TRENDS 2030: ALTERNATIVE WORLDS, a publication of the National Intelligence Council. It's 23 MB so it might take a while...
Download GLOBAL TRENDS 2030
New for August 2012: Skip down to obtain a free copy of Matthaei, Young and Jones filter book!
If you have something we can
add to this area, we'll trade you a free
gift, or if your work is really outstanding, we'll pay you for
it (but not much!)
Our download area is divided
into three categories:
and text downloads
and text downloads
The spreadsheets below supplement
our calculator page, and in general
offer data-crunching that is too complicated to put onto an HTML
page for you.
A lot of people ask us "why
do you create spreadsheets for calculating stuff like group delay,
when all these calculations and more are built into Agilent's ADS
software?" There are two reasons, Silly Rabbit: first, not
everyone has spent $50K on software, but everyone has Excel. And
second, you have a lot more options for presenting data using Excel.
How many times have you sat through a design review where all of
the plots were cut and pasted from ADS (or worse, Eagleware Genesys)
outputs, and you can't identify what you're looking at or what any
of the values are?
New for September 2012: we have two new downloads, one for calculating capacitance and one for calculating complex impedance from S-parameters. The capacitance calculator does the very simple job of calculating parallel plate capacitance, but it will save you the trouble of unit conversion and looking up the Dk of stuff like silicon nitride. While we were at it we included the capacitive reactance calculation at the frequency of your choice.
Download the capacitance calculator
Chris provided the calculator for converting magnitude and phase to impedances, which is a fundamental problem that belongs on any final exam in a microwave class (tell your boos that and ask him to derive it some time for fun).
Update December 2012: the impedance calculator download has caused a lot of trouble, which may or may not be related to the age of this web site (hopefully we will globally fix this problem and more during 2013...) The problem is that in most browsers, it is not possible to download a .xlsx file (the 2007 version or later of an Excel file) from this Cold Fusion page that was created in Dreamweaver 11.5 (in case you want to assign blame). The file that Chris sent us was the first Excel file that we have dealt with that could not be converted back to .xls due to some tricks he employed. Many people have tried unsuccessfully to download it, and a small number have written to us to complain and we have sent them the file by email. Now we offer the ultimate patch: we zipped it. Download it and and unzip. Sorry for the inconvenience!
Download the impedance calculator in a Zip file
If anyone makes improvements to this or other downloads on this page please shoot them back to us and we will update the offerings!
New for August 2010! Here's
a spreadsheet that extract Dk and Df from transmission line measurements.
The technique is explained
on this page. The spreadsheet contains some data that was provided
to us, you'll have to copy over it, and perhaps do some formatting...
the Dk and Df extraction spreadsheet
New for May 2010! The
Professor has donated his image rejection spreadsheet. Thanks! This
file will help you understand the relationships between phase and
amplitude imbalances, and overall image rejection, which is also
explained on this
the Professor's image rejection spreadsheet
New for October 2009!
Here's a spreadsheet that calculates characteristic impedance of
a transmission line based on measure reflection coefficient. It's
explained on this page.
the impedance calculator spreadsheet
New for September 2009!
Here's a spreadsheet that performs via-hole
inductance for microstrip circuits.
the via-hole inductance spreadsheet
New for May 2009! In the
spreadsheet below, Chris answers an important attenuator question.
What if you are building a pi attenuator from standard resistors
and you're stuck with 1% values? This spreadsheet calculates exact
attenuation and return loss from the inexact resistors, for
0.2 dB step size. Thanks, Chris!
Chris' standard value attenuator spreadsheet
Also new for May 2009!
We have a modification to our famous S-parameter Utilities spreadsheet,
from Kelvin. The new spreadsheet adds stability measure on the plot
of stability factor and maximum available gain. Click
here to jump down to it.
New for March 2009! Here's
a spreadsheet for looking at mixer spurs, contributed by Gerald.
Thanks! You need to enable macros to get it to work. Also, it was
originally intended for Europeans so decimals are separated by commas
instead of points. Here's
a companion page on how to use it.
the mixer spur spreadsheet
New for February 2009!
Here's a simple spur table calculator from Larry. If you go
here you can read a reprint of a related Microwave Journal article
that describes intermodulation tables in mixer simulations. Thanks!
And we're sorry in advance if/when the link to the article breaks!
Larry's spur table calculator
If you keep reading down this
page, we have at least one one other spur table download. Collect
New for January 2009! Here's
a spreadsheet that not only calculates the ideal values for lumped
elements in a high-pass/low-pass
phase shifter, it plots the frequency responses of the two filters
and their relative phases over frequency! This is a good example
of using ABCD parameters and
complex math in a spreadsheet, we have started a description of
here. A word of caution (and we found this out the hard
way but we still don't have a full explanation...) this is an Excel
2003 file, you may have trouble trying to run it in Windows Vista,
because the analysis tool-pak that does complex math (sometimes)
gets fubared! The spreadsheet may still be a little rough around
the edges, please give us some feedback for future improvements.
the HP-LP phase shifter spreadsheet
Also new for January 2009!
Here's a link budget calculator
from Andre. He supplies this spreadsheet to engineers considering
point-to-point wireless connections. OK, this is practically a free
advertisement for Adtran, so when you contact them, tell them you
found them through this web site and that maybe they should cough
up for a sponsorship or we'll remove the link budget calculator
one of these days!
the link budget calculator
New for December 2008!
Here's a freespace path loss calculator contributed by Robert! It
is something he put together for coworkers so they could understand
Wi-Fi a little better. It allows you to customize the general RF
situation in the environment (allowing you to match real world better
to estimations). It also allows you to select different frequency
ranges. This is an Excel 2007 file, software which we don't have,
so we have yet to try it! If anyone has any comments of suggestions
we will relay them to Robert. Note that the file is zipped, we had
to do this because most web browsers won't know what to do with
an "xlsx" file!
Robert's Freespace Path Loss calculator
New for October 2008!
Here a spreadsheet for analyzing even and odd mode impedances of
the even/odd mode analysis spreadsheet
New for August 2008! We
now have a multi-section Wilkinson power divider tool for Excel.
It is (hopefully) described in detail on
this page. It will analyze up to eight sections but is limited
to equal split. The transmission line sections are based on Chebyshev
equal-ripple transformer calculations and are exact for the bandwidth
that you specify. The resistor calculations are not perfected yet
so you might not get the best possible isolation without optimizing
the resistors on your own. Be sure to "enable macros"
when you open it, and you might have to enable the "analysis
tookpaks" to get it to work (look under "tools",
the Wilkinson power divider spreadsheet
New for July 2008! Here's
a "reverse microstrip calculator" spreadsheet that lets
you specify impedance and it solves for line width. It use linear
interpolation, and is explained
on this page.
the reverse microstrip calculator
New for June 2008! here's
a simple spreadsheet that will help you understand the concept of
the frequency translator spreadsheet
New for June 2008! Here's
a spreadsheet from Nick, which we'll let him describe...
I enjoy Microwaves101 far
too much to be considered normal. Accordingly, the enclosed utility
might spark some interest on the subject of VNA calibration fundamentals
in some other kindred spirit. I can't imagine another forum that
would possibly have any interest at all...
If you think the attached
worthy, please accept it gratis for use as a YAOD (Yet-Another-Oddball-Download).
the calibration utility
Yes, Nick, Microwaves101 will
always provide a home here for YAODs. Please follow up with some
text explaining the spreadsheet and we'll post a page with an example...
Updated August 2009! Here's
a spreadsheet from Chip that simulates the Klopfenstein taper. We
made it more usable, with 21 impedance steps. We're working on an
explanation on this page.
the Klopfenstein taper spreadsheet
And updated further for June 2013! Thanks to David, the spreadsheet below now has a correction to the math which was published by Kajfez and Prewitt in 1973. David also made other improvements to make the spreadsheet more usable. Thanks again!
Download David's Klopfenstein taper spreadsheet with the K&P correction
Also new for May 2008!
Here's our version of a poor man's CAD tool for doing layouts (like
Visio, or a really cheap version of AutoCAD). It's all explained
on this page.
New for April 2008! This
Excel spreadsheet calculates free space loss and and Fresnel zone
radii. Inputs are frequency in GHz, transmitter TPO, antenna gain,
transmission line loss, path distance, RX threshold, and obstruction
distance for the Fresnel radius. Outputs
are freespace loss in dBm, RX signal in dBm, RX fade margin, 1st,
2nd, 3rd and 4th Fresnel zone radii at the obstruction (calc) point.
Contributed by Tim!
Tim's microwave path calculator
New for March 2008! We've
finally got around to dressing up our VSWR
spreadsheet into something we're proud of! We fixed the math, and
added a slider bar so you can animate the waveforms. Note:
you have to enable macros in order to get this spreadsheet to work!
This spreadsheet has its own page of instructions
the latest standing wave spreadsheet
New for February 2008!
Here's a spreadsheet that shows you how to do linear interpolation
in Excel, a valuable skill in any engineering field. We're working
on a page that describes this
the linear interpolation spreadsheet
Added March 2008. Here's
a spreadsheet contributed by Harald that shows you how to access
the polynomial curve fitting capabilities of Excel! Here's Harald's
description of its capabilities:
Everybody knows that you
can produce a graph and add a polyline to it. But do you know,
that you also can calculate the coefficients for a polynomial
in Excel from a set of data and use them in your spreadsheet directly?
You also can display the function of this polyline in the graph.
You can copy and paste this formula into a cell for further use
in the spreadsheet. It works, but you have only the accuracy as
displayed in the graph and it is a lot of work. I did that until
a coworker came up and said there is a simpler way to do it without
creating a graph and the copy and paste work.
This function is very well
hidden in Excel and not easy to find. I created an example spreadsheet
to show how it works. Up to which order of polynomial it works,
I have not tried out yet. The benefit of this function is, that
you have the full accuracy of Excel for each coefficient, this
is especially important for higher orders of polynomials.
The Excel Version I have
is Excel 2003, the conditional sum wizard needs to be installed.
the polynomial curve fit spreadsheet
Also new for February 2008!
Here's an RF unit converter from Frank. Thanks! It's an executable
file that converts watts to dB-stuff and voltages, and more. Below
is a screen capture that illustrates the capabilities:
the RF unit converter
And also new for February
2008! We have a new page that offers some free downloads courtesy
of the U.S. Navy! The Navy
Electricity and Electronics Training Series (NEETS) was written
as part of the non-resident training course series and released
to the public in 1998. We've only posted the topics that have to
do with microwaves, radar and radio, but if there's enough interest
we might upload the entire set. You can find these training manuals
on many other web sites, but few have the bandwidth that we have
for rapid downloads. Some lesser web sites even try to sell them!
Thanks to Steve for suggesting this idea!
Improved for August 2009!
The previous version was missing a couple of curves. We've created
a bare-bones Smith
Chart using equations for circles inside an Excel file. Then
we stripped away the equations and left just the data. You can use
this file any way you like, to plot data on the Smith Chart inside
Excel. We'll be using it on some future spreadsheets, you betcha.
the Excel Smith Chart
New for December 2007!
Here's Kire's level diagram spreadsheet. Kire is one of our best
"answerers" on the Microwaves101 message board, he's a
prime example of what makes this a great web site.
Kire's level diagram spreadsheet
New for December 2007! Phil
sent us a microstrip miter spreadsheet, thank you sir! In his own
Heres a calculator
that I made for quickly making miters in AutoCAD. Your's, like
all other ones Ive seen reference the same A, X, and D
dimensions. However, to draw a miter in AutoCAD with these dimensions
can get tedious with the keystroke entry of perpendiculars,
offsets, and trim commands, etc. and then have to repeat it
on an assembly with many bends.
With this calculator,
you enter the bend angle and it will calculate the distance
for you to enter when you invoke the CHAMFER command in AutoCAD.
This will quickly let you put the optimum miter on any arbitrary
angle from 0 to 90 degrees and you can just click-click-click
your way through any bend.
The table below the calculator
just takes the equation and fills in a variety of widths and
Pardon the minimal graphics,
I made this not as a full self-explanatory file, but just something
simple to give our CAD guys to speed up their work. Feel free
to use or modify any of it, but this only works for AutoCAD.
Other tools use a different method for calculating miters.
Phil's miter calculator
New for October 2007! Here's
a spreadsheet that analyzes coupled-line
couplers. You can vary the coupling factor, then see what an
ideal coupler does over frequency. Be sure to turn on Excel's Analysis
the coupler spreadsheet
New for September 2007:
Here's a spreadsheet that will help you floorplan a power amplifier!
It is described on this
the power amp designer spreadsheet
New for August 2007: here's
a spreadsheet that calculates resistor values for minimum loss L-pads
which are described
the L-pad calculator
New for May 2007: here's
the start of a spreadsheet that looks at the array factor for phased
array antenna calculations. Well, OK, it only looks at a single
line of antennas (from 1 to 101), it would be too big to download
if it simulated an entire array in two dimensions. It is far from
finished, but maybe some smart person out there can take over for
us and put some more effort into it. It is useful for looking at
the various tradeoffs of gain versus number of elements, grating
lobes as a function of element spacing, number of phase shifter
bits, type of phase shifter, and a few other things. Feedback is
the phased array calculator
New for December 2007:
we combined the waveguide table contributed by Alan from NZ with
our waveguide loss spreadsheet, and we added the capability to model
dielectrically-loaded waveguides (which coincidentally has a new
page here at Microwaves101!) There's a mess of improvements,
including a pull-down table for selecting different conductors,
and some new graphs.
the waveguide loss spreadsheet
New for December 2006:
here's a rectangular waveguide table that is more complete than
the one we have on
this page. It was contributed by Alan D. from NZ. It has the
three primary official designations along with some commercial designations,
and interior dimensions are given in millimeters and inches.
the waveguide table
Here's the start of an optimum
the optimum miter calculator
Updated January 2011:
we fixed a bug in our coax calculator spreadsheet, the loss
tangent of foamed PTFE was way too high, as pointed out by Joe who
was getting ridiculous loss numbers when simulating RG6! There is
perhaps no more easily analyzed transmission line than coax.
Our spreadsheet performs the exact
calculation of metal losses of coax with frequency (splitting
out the calculations for center and outer conductors). It also computes
dielectric losses due to loss tangent and dielectric conductivity
and a ton of other parameters like characteristic impedance, capacitance
and inductance per unit length, cutoff frequency, etc. The spreadsheet
handles the offset
coax calculation. See why our spreadsheet is a ton more useful
than Agilent's ADS for analyzing coax! Thanks to Sergio from Italy,
the latest version adds surface roughness to the calculation, a
topic that we all need to
the latest coax spreadsheet
Updated May 2010! Here's
a multidielectric coax calculator, contributed by Alex R. We recently
corrected a problem with the cut-off frequency calculation for single
dielectric, which was pointed out by Andrew (thanks!) It will calculate
characteristic impedance of coax that contains up to five concentric
dielectrics! Be sure to check out our page that explains
the multi-dielectric coax spreadsheet
Updated for September 2007:
here's a filter calculator from Vlad, which does lumped element
calculations (Chebyshev and Butterworth) and is very cool and admittedly
better than the Excel calculator that we offer farther down the
page. We now have a page
that describes how to operate Vlad's calculator (but it's so
simple you could figure most of it out yourself). We've had a lot
of positive feedback about this calculator. The latest version offers
the uses control over the plot axes. Please send us your comments
on this calculator, Vlad volunteers to fix any problems you have!
Vlad's filter calculator
New for July 2006: here's
a MATLAB (c) tool for cylindrical resonant
cavities. Contributed by Itzik!
the cylindrical resonant cavity calculator (in the form of a zip file)
December 19, 2013: our S-parameter
Utilities spreadsheet is the ultimate tool for manipulating
S-parameters into all manner of plots, including group delay, K-factor,
maximum available gain, VSWR, mismatch loss, loss factor, and input
and output impedance plots. You can now quickly plot all of these
parameters, from any manufacturers' S-parameters that you can download!
We recently added the ability to calculate length of a transmission
line (if Keffective is known), or velocity factor and Keffective
if length is known. The spreadsheet has the ability to import
data in real/imaginary format (in addition to magnitude or dB).
It provides reference plane extension capability, and averaging
to the group delay, VF, Keffective and length calculation, and even
does Smith chart plots! We recently fixed a bug in the GMAX calculation
which fixes a problem where 15 digits of precision within Excel
sometimes aren't enough! (Explanation of this statement can be found
here.) The spreadsheet can handle 2001 lines of data, if you
want a smaller file it's up to you to truncate it. The latest version contains Mu1 and Mu2 calculations, tow more ways to look at stability. Mu1 and Mu2 should always be greater than 1.
our S-parameter Utilities spreadsheet
February 14, 2013! Back in 2006 we created the heart-shaped S-parameters file and offered it in a spreadsheet download. We all know how SNP files sometimes don't work, so we updated the file slightly and it has been verified to work in Microwave Office. We added a second smaller heart while we were at it. Just tell your Valentine to plot all four S-parameters on a Smith Chart, and he/she will get the image below (plotted in MWO). We had to zip the file, otherwise it won't go through the download chute (it doesn't like the .S2P extension).
If you prefer, here's our S-parameter
utility spreadsheet with the "heart curve" built in
so you don't have to load the S-parameters into Excel. If you're
lazy, just grab the graphic below and toss it into a steamy email!
Here are the equations
that we used to generate this graphic, we adapted them from something
we found on the worldwide web.
a download for looking at mixer waveforms. We have a new mixer
waveform page that will show you how to use this to understand
how a mixer works, in the time domain.
the mixer waveform spreadsheet
Chris and Graham from across the pond have sent us a cool spreadsheet
for calculating mixer spurious products! It's as good as the one
at Hittite.com, but because you download it before you use it, no
one will ever know your secret frequencies! The Microwaves101
Professor has outdone them with an expanded mixer spur calculator
which you can now download. We have also put up a page on the instructions
for using the revised calculator, check
Chris and Graham's spur calculator spreadsheet
The Professor's spur calculator spreadsheet
Here's one engineer's collection
of aerospace slang, it's from Carl F. Gauze who works at Anonymous
Aerospace. (Danger Will Robinson, this document contains the F-word,
so don't download it if you have a problem with that!) Click
here to go to the Microwaves101 slang dictionary.
Carl's Aerospace Slang dictionary
Much improved for February
2005: here is our lumped-element Chebyshev filter calculator!
It now includes plotting capability, so you can synthesize filters
and play with them in real time! (We are still working some
bugs, be sure to look over the "readme" page.) Using this
Excel spreadsheet you can calculate ideal elements for N=3, N=4
and N=5 order low-pass, high-pass, and band-pass filters, and you
get to specify the passband and the ripple. A full description is
given on our section on lumped-element
the Chebyshev lumped-element filter spreadsheet
New for January 2005: this
SPICE skin effect cable attenuation model was contributed by Mike
Leung of Northrop Grumman Space Technologies (formally TRW). This
is for engineers who model circuits using SPICE, which unfortunately
excludes everybody at Microwaves101! But it looks cool so we will
pass it along!
the SPICE skin effect cable attenuation model spreadsheet
Here's a spreadsheet for calculating
N-section impedance transformers, to match two real impedances that
you specify! Improved for November 2005! The "bug"
is fixed, you can now transform in both directions (Z1<Z2, Z1>Z2).
In July, the Professor redid the calculator (again!), it now calculates
equal-ripple, maximally flat and exponential transformers (up to
eight sections). It even displays the frequency response, you don't
need ADS or Eagleware or other expensive software! Note: If your
Excel software doesn't have the "Analysis ToolPak" installed
, you might not be able to view the graphs properly. Go to "tools",
then "Add-Ins", then check the box for "analysis
ToolPak". Check out our page on quarterwave
tricks for more information on transformers.
The Professor's N-section impedance transformer spreadsheet.
sheet resistance spreadsheet calculates the equivalent ohms
per square versus frequency for up to three layers of different
metals, using the skin depth
equation and a little calculus that we already solved so you won't
have to tax your tired brain! This is a feature you won't find on
Agilent's ADS software, and if you did it would have more bugs than
Mount Katahdin! It also
has a single-metalization option that plots resistivity and conductivity
for 1, 2, 3, 4 or 5 skin depths (per request of Chris G.) The spreadsheet
is totally unlocked, and features a pull-down menu of metal parameters
for your convenience. Try out our on-line skin-depth
calculator for quick analyses!
the RF sheet resistance spreadsheet
Cascade101.xls - the best cascade
analysis spreadsheet you'll ever get for free. For more information
about this and other cascade analysis tools, check out our Cascade
Analysis page. Send us an email if you want a cascade tool with
the cascade analysis spreadsheet
New for October 2006:
here's a couple of Visio files that contain graphics for coax and
waveguide schematics of block diagrams. These were supplied by Ted!
the waveguide Visio files
the coax Visio files
What would a microwave web site
be without some handy Smith chart downloads? Here are some great
Smith charts that are low in megabytes but high in resolution,
perfect for documents!
black and white Smith Chart in Adobe Acrobat pdf. Here's a color
Smith Chart. (Need the Acrobat reader? Click
a Microsoft Word document that contains schematic symbols
such as resistors, capacitors, circulators, attenuators and switches,
power dividers, bias tees, DC blocks and assorted other microwave
components. In the latest edition (July 2011), we've added
a symbol for a ferrite bead, per William's request. You can use
this file to create your own schematics for documents and presentations.
Please send your feedback on this work-in-progress to firstname.lastname@example.org.
Electronic Symbols 20.doc
New for August 2005: check
out Varian's "History
of Radar" ads, those cats were real gone!
Here's a poster for your lab
in PDF format. Print it and post it and help us Fite
Are you sick and tired of picking
up a connector out in your lab and finding that some one else wrecked
it? The Unknown Editor has a solution for you. Post this handy guide
Care in your lab! It's updated for 2007, thanks to Vinny who
caught a mistake on the torque spec (inch ounces should have
read inch pounds!)
At Microwaves101 we pride ourselves
on building microwave information into our encyclopedia, so it is
indexed, cross-linked, and totally convenient. Not like some crummy
pdf data sheets and app notes that suppliers put up for you to go
crazy waiting two minutes to download so you can spend ten minutes
looking for and probably not finding the info you need. We also
make it a point not to steal stuff from other web sites and offer
it as our own.
But in some cases, we realize
there are documents out in the public domain that we can collect
and offer in one convenient place. Here's two examples.
New for August 2012! Thanks to Rob, we now offer Microwaves101 Hall-of-Famers Matthaei, Young and Jones "Microwave Filters, Impedance Matching Networks and Coupling Structures" which dates back to 1963 but is still the most complete book on microwave filters ever written, at 1,000 pages. This material was developed under government contract and hence is approved for public release by DTIC (which is where we found it).
Download MYJ Part 1
Download MYJ Part 2
for December 2010! Thanks to Chris, we now offer a copy of an
1954 NRL report dating from 1954, on the design and calibration
of horn antennas. NRL
Report 4433 DESIGN AND CALIBRATION OF MICROWAVE ANTENNA GAIN STANDARDS,
by William T. Slayton, gives dimensions for construction of a series
of microwave horns of known gain, and may be used as a calibration
reference. The horns are designed to match up well to standard waveguide
sizes. Virtually all standard gain horns on the market follow the
dimensions called out in this report.
We found the document at the
Defense Technical Information
here. So we'll assume it is public domain, and offer it through
the link below. Enjoy!
DESIGN AND CALIBRATION OF MICROWAVE ANTENNA GAIN STANDARDS, NRL
New for April 2011! We
have much more on material on William Slayton thanks to his daughter
Charlotte! Here is a much better copy of the NRL report.
DESIGN AND CALIBRATION OF MICROWAVE ANTENNA GAIN STANDARDS, NRL
Report 4433 (Improved copy)
Here is an article he wrote for
Electronics Magazine in 1955, on the same topic!
Design of Microwave Gain-Standard Horns
Finally, here is a speech he
gave in 1980 about his experience at NRL, three years after his
Slayton's 1980 speech
It's no wonder that William Slayton
is in the Microwave
Hall of Fame!
New for February 2010!
The Quadrennial Defense Review report is put together every four
years by the Department of Defense, the latest was issued February
2010. This report defines where we are on the war on terror, as
well as the to-be state. If you want to win a government defense
contract you should read this and reference it in your proposal.
the Department of Defense February 2010 QDR
Here's the previous QDR report
in case you want to see what changed.
the Department of Defense February 2006 QDR
The US Department of Homeland
Security also issued a quadrennial review report in February 2010.
the Department of Homeland Security February 2010 QHSR
has a strategic plan, you should read it!
DARPA's 2007 strategic plan
The Navy's Office of Naval Research
has a plan for science and technology, some of which is gonna involve
some very high power microwaves...
the ONR S&T plan
The Navy released some great
tutorial documents in 1998, including an entire series on electronics.
We've posted the NEETS documents on a separate