- Buyers Guide
Military Microwaves Supplement
Recent Advances in Radar Technology
Using Calibration to Optimize Performance in Crucial Measurements
3.5 dBi Dipole Patch Antennas
The Squint series low profile patch antennas feature a 3.5 dBi dipole-like pattern shape and ceiling-mount capability that provides a low profile for minimum visual impact. The radiation pattern has a 55° beamwidth with the maximum directed at 45° from the horizontal plane. Gain at the horizon is 2.5 dBi. The antennas are designed with a high quality etched copper circuitry to provide good electrical performance. The antenna housing is injection molded of polyvinyl chloride in a rugged radome that is weather resistant for outdoor applications. The units have an SWR of 1.5 (max) on 50 W impedance and are equipped with a standard 1 ft UltraLink coax and N-female connector. Additional connector and coax options are available upon request.
The model DB809HVDE-TP omnidirectional antenna (from the company’s Diversity Master™ series) features dual polarization, which incorporates horizontally polarized and vertically polarized antennas (each with 9 dBd gain) within one radome to realize receive diversity. This design provides operators with the added benefit of 360° signal penetration. The unit operates from 896 to 942 MHz for paging and trunking applications and offers an input power of 500 W per connector, gain of 9 dBd and isolation of greater than 30 dB.
Allen Telecom Inc., Decibel Products Div.,
INMARSAT Antenna Assembly
The model AS90-15C/2 antenna assembly features a 7.5' mesh reflector and circular polarized L-band feed and meets the INMARSAT standard A sidelobe requirements. The unit features a receive frequency of 1525 to 1559 MHz and transmit frequency of 1630.5 to 1660.5 GHz, gain of 28.5 dBic (min) (receive) and 29.2 dBic (min) (transmit), operating power of 60 W and an axial ratio of 2 dB (max).
Seavey Engineering Associates Inc.,
10 kHz - 3 GHz Rotatable Antenna System
The model AU900A4 rotatable antenna system allows the reception of electromagnetic waves in the 10 kHz to 3 GHz frequency range. The unit features a modular design and consists of individual standard components that are combined and adapted for the optimum reception of electromagnetic waves in the frequency range. The components include various omnidirectional and directional antennas for horizontal and vertical polarization. The system can be tailored easily to any requirements by removing individual components to suit the particular task.
Rohde & Schwarz GmbH & Co.,
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