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Below are a few of the representative products among the hundreds SAS has developed.

EMC TEST PRODUCTS

EMC test system for 20-220 MHz, with 10 kw compact LPA, shown on 2-4 m. adjustable height, roll-around dielectric crank-up mast. Mast is capable of polarization change from H to V, and up to 15 deg. forward tilt .

EMC test system for 65-220 mHz, with 5 kw LPA, shown on 2-4 m. crank-up roll-around dielectric mast with tilt and polarization adjust

Drive-in E-Field generator for 0.01-20 mHz @ 10 kw
One of several designs developed at SAS for EMC testing of vehicles and other devices with susceptible electronics inside. E-fields in excess of 300 v/m are generated, and the units are designed to accept 10 kw cw. Air-cooled resistor banks are used which do not require any other coolant.
The entire structure is designed for rapid assembly and disassembly, thus freeing up valuable chamber space when not in use.

   

LOG PERIODIC ARRAYS

4-16MHz 20 kw Log Periodic Array for OTHR

The unit shown is our SA LPMA4, and operates over 4-16 MHz (useable 3.5-21 MHz) provides up to 12 dBi gain and handles 20 kw cw power levels. The unit was designed for OTHR (over-the-horizon radar) use, and is supplied with an extensive on-earth ground system.
The antenna system is designed to be portable, and can be set up by a few people in a relatively short time . Weather protection is included, and 100 mph wind survival is standard.

SAS has developed HF OTHR antennas, including 10 kw transmit LPA’s and multiple receive LPA’s used by the US Navy for early-warning systems.

20-150 MHz dual-polarized LPA
A 20-150 MHz model is shown, one of many types developed . Two feedpoints are provided for the two orthogonal linear polarizations. A hybrid coupler may also be used to create circular polarization.
SAS has developed an end-loading system for the lowest-frequency elements on it’s log periodic arrays, which reduces element lengths and wind loading without sacrificing gain.

35-150 MHz Rapid-Field-Deploy LPA for Meteor Bounce
This array operates over 35-150 MHz @ +8 dBi gain, and was designed for a major Meteor Bounce Program, with many hundreds of units shipped. Two persons can assemble/disassemble this antenna within 8 minutes. Folding elements, a two-section boom, and the SAS end-loading system, along with earth-mounted installation fixtures all contribute to the ease of use of this array.
20-500 MHz Communications LPA
Operating over 20-500 MHz, this antenna also utilizes the SAS end-loaded element system to reduce size and wind area. Stabilizer rods made of fiberglass provide inter-element spacing stability, guaranteeing electrical performance remains constant under high wind conditions, up to 100 mph.

SA LP700-1
0.7-2.7 GHz Log Periodic
For hand-held field use

SA LP700-1
0.35-7.2 GHz  Log Periodic with swivel mount

OMNDIRECTIONAL ANTENNAS

SA CM20-2, 20-500 MHz Omni
(bottom antenna)

SA UWB300, 0.3-12.4 GHz Omni
(at top)

A new ultra-wide-bandwidth vertical Omni, which covers 300 MHz to 12 GHz (useable to 20 GHz)
A new ultra-wide-bandwidth vertical Omni, which covers 820 MHz to 20 GHz !
Discone Antennas
A group of 30-400 KHz ground mounted discones is shown on the right. SAS has developed various discones, including rapid field deploy types.

30-90 MHz Rapid Field Deploy OMNI'S
These omnidirectional vertically polarized dipole antennas exhibit a wide instantaneous bandwidth and high efficiency, which result from their mechanical design. They are easily erected in the field, and fit neatly into carrying bags for transport.

 

20-400 MHz Rapid field-deploy omni’s
This type of conical monopole can cover 20-500 MHz, when ground mounted and using wire radials or when vehicle- mounted. The vehicular version is currently in use by NATO in Europe.

 

 

30-76 MHz Robust Omni
This extremely rugged biconical dipole was one of the first antennas ever developed by SAS, and a significant number of them have provided ground communications from mountaintop locations at the NTC (National Training Center) Ft. Irwin, California since 1982. The antenna is rated for 140 mph wind survival.

DF Array
SAS has developed many antenna arrays used for Direction Finding Applications. Shown on the right is a 3-element 2-30 MHz array used by the US Navy. Another DF array covers 20-500 MHz (in three bands) with +/- 2 deg. phase matching.
225-400 MHz Colinear
A 225-400 MHz two element collinear array is shown on the right. “Fat” dipoles developed by SAS are available for frequency ranges up to 2.8 :1.
Specific dipoles and monopoles are available for frequency ranges of 100-500 MHz, 0.5-1 GHz, and 1-2.5 GHz, and other frequency bands such as the cellular and ISM bands.
2-30 MHz Conical Monopole
A field-deployable wideband vertical omni, which can be erected by two persons in a short time.
NTC Base Station Antenna
Stacked collinear broadband dipoles are provided on a common mast. The dipoles are shown installed for vertical polarization, however the installation kit allows for horizontal polarization as well.

This type of collinear dipole array is available for many frequency bands, for instance, the SA V425 designed for the US Navy, tuned for 400-450 mHz with +4 dBi and 1.5 kw cw power handling .

AIRCRAFT ANTENNAS

100-500 MHz Blade Antenna
The SA AM100-3 has been in service on Falcon and Lear jets since 1983 . The antenna handles 400 + watts cw, and is used for com-jam applications.

20-100 MHz Aircraft Antenna
The SA AM20 is a robust design, capable of 200 + watts power input. The unit has seen service on large aircraft in com-jam applications.


 

TEST FACILITIES

ANECHOIC CHAMBER
An indoor anechoic chamber is used at SAS for most antenna measurements in the frequency range 0.45-6 GHz. Outdoor test facilities include an open- field site in Watsonville, CA and an 11 acre site in the Sierra foothills near Sacramento, CA.