Gunn sources and Dielectric-resonant Oscillators available from:
SHF Microwave Parts Company
7102 W. 500 S.
La Porte, Indiana, 46350, USA
For more information send e-mail to arutz@shfmicro.com
To get these parts from us, just send us e-mail telling us what you want. We ship small quantities anywhere, and we keep shipping costs low.
K-band source with dual-detectors and varactor modulator diode
click here for connection diagram and specification sheet
This unit has two detector diodes arranged so it can detect if something is moving toward or moving away from it. There is also a varactor modulator/AFC diode in this unit to set the transmit frequency or apply modulation, and it does have a 5 milliwatt Gunn diode and a standard WR-42(UG-595/U)flange output.You can make your own horn antenna by downloading the N1BWT program available just below the photo. The units measure only .8"L x 1.03"W x .95"H, (20mm x 26mm x 24 mm) and are powered by 5 vdc. A mechanical adjustment screw easily adjusts the unit from about 22 to 25 ghz, and the varactor can electronicly control the frequency also. They are new, and the cost is $US75.00 each.
Want to know how to send video over microwave sources? Click here and go to PC Electronics website!
Here is PC Electronics video page!
Click here for a waveguide to coax transition, by WA6EXV
Download N1BWT's horn-design program here!
or click here for an Acrobat file of a 16 db horn for 24.125 ghz designed with N1BWT's program above
10 ghz Dielectric-resonant Oscillator
(this unit does the same job as the Gunn source below)
I am no longer able to get the X-band Gunn sources shown below, but I can now offer a good replacement device in this DRO shown here. This unit contains a transistor oscillator running at 10.525 ghz, and its frequency is stabilized by the use of a Barium-titatenate "puck", which holds the frequency about 10 times closer than was possible with the older Gunn-diode sources.
These DRO modules contain 2 transmit and 2 receive patch antennas printed on the pc board and visible in one of the photos. Normally, these devices are used for detecting the presence of a moving objects, but Amateur Radio Operators also use these devices to send and receive X-band signals up to 20 miles distant. These units tune from 10.400 ghz to 10.700 ghz with a small allen-wrench screw, and with modification, these units can be pulled as low as 10.300 ghz. These units produce about 8 to 10 mw of RF, and can be modified to use SMA pcb connectors instead of the transmit or receive antennas.
These units weigh 2/10 of one ounce (about 5 grams) and are powered by +5 vdc. They can be modulated by varying the source current, and they offer a receive sensitivity of -110 dbm, using 70 Mhz as an I.F. frequency. Each unit costs $US15. Please e-mail with questions to arutz@shfmicro.com
Do you need a coaxial connector output or input? Here is a couple of photos of experiments made in the past, showing how to cut the pc board and add an SMA coaxial connector. This was effective and did produce 10 mw of RF output, so it matched the RF OK. I am also showing an SMA connector that I keep in stock if you want to order them from me... $6 each for the SMA connectors.
10 ghz Gunn source with varactor modulator
No longer available for sale... Nov 2007 -- See replacement device DRO above
To download an Acrobat .pdf data sheet (140Kb), please click here 10 ghz source
This unit was made by M/A-Com, but is now made by MDT. They are exactly the same source. This device produces 10-15 milliwatts of RF output. It operates on +8 vdc, and includes a sensitive Schottky mixer/detector diode (200 ohms output impedance) for reception, and a varactor modulation diode that uses 1-20 vdc for up to 100 Mhz of frequency-control and modulation. A mechanical tuning-screw allows the frequency to be adjusted from about 9 ghz to about 11.5 ghz. Weight is about 5 oz, and measurements are 43 mm x 42 mm x 42 mm. Uses a standard UG-39 flange for RF connections.(here is the matching horn!) Ask for M/A-Com 10 ghz model when ordering. Each unit costs $US86.
Here are some links that describe possible data/wireless uses for these units:
Want to know how to send video over microwave sources? Click here and go to PC Electronics website!
Here is PC Electronics video page!
Click here for a waveguide to coax transition, by WA6EXV
Luis' EB7GWL's web pages for pc boards for ethernet project
N6GN's web page
Our FAQ Page
Download N1BWT's horn-design program here!
or click here for an Acrobat file of a 15 db horn for 10.250 ghz designed with N1BWT's program above
return to main page!