|
 |
Slotted Wavguide Antenna - RF Cafe Forums
|
| crash66429
|
|
Post subject: Slotted Wavguide Antenna
Posted: Thu Aug 14, 2008 11:31 am
|
|
Joined: Tue Jul 15, 2008
11:35 am
Posts: 2 |
|
I have been tasked with building a slotted waveguide
antenna for the X-Band. As this would be my first
attempt, I would appreciate any words of wisdom,
tips, tricks or material recommendations. So far
I plan on slotting the WR90 which will be soldered
to a choke flange. That will connect to the cover
flange WG to SMA connector. Thanks!
|
|
| |
|
 |
|
nubbage |
|
Post subject:
Posted: Fri Aug 15, 2008 6:03 am
|
|
| |
| General |
 |
Joined: Fri Feb 17, 2006
12:07 pm
Posts: 218
Location: London UK
|
|
Hi crash
I was on a Sperry team designing and
building these for marine radar at 9375MHz many
years ago. The milling of the edge slots (or as
well the broadside slots) is quite critical in order
to keep the gain up and the sidelobe level low.
Also you need to consider the array illumination
function most appropriate for your application.
This might be Tchebychev, cosine-on-pedestal etc
each of which has a specific beamwidth and sidelobe
level characteristic.
I have a few designs ready-done
(by others) for 10.3GHz.
What are your design
criteria, like operating bandwidth, gain, sidelobe
level, polarization etc?
Is this a student project
or a commercial product?
|
|
| |
|
|
|
|
crash66429 |
|
Post subject:
Posted: Thu Aug 21, 2008 11:12 am
|
|
Joined: Tue Jul 15, 2008
11:35 am
Posts: 2 |
|
I am reverse engineering an existing functional
antenna. It was done as a student project at the
masters level. The student has moved on and left
us with only the physical antenna. It is being use
for the testing of a commercial airborne SAR prototype.
I need to reproduce the antenna and later possibly
make improvements.
The operating BW is 500MHz
centered at 9.75GHz. I believe the beamwidth is
30 degrees. The configuration is a linear longitudinal
shunt slot array. I do not really have all of the
other design parameters at hand. That’s what I have
been able to determine so far. Thanks for your input!
|
|
Posted 11/12/2012
|
|
|
|
