Communications: radio wave antennas – Antennas – Measuring signal energy
Patent
1987-09-29
1989-09-05
Sikes, William L.
Communications: radio wave antennas
Antennas
Measuring signal energy
342173, 343777, G01S 740
Patent
active
048643157
ABSTRACT:
An arrangement for testing the performance of an electronic system utilizing a phased array antenna as its principal radiator into a predetermined sector of space includes, as one of its main components, an enclosure which bounds a miniature anechoic chamber located in the near-field region of the antenna array during the performance of a testing operation and lined with material that absorbs free space electromagnetic radiation. The enclosure has an opening that is aligned with the phased array antenna the performance of which is being tested. Two dual-polarized testing horn antennas are situated at a wall of the enclosure that is opposite to the wall provided with the opening. Electrical signals received from the horn antennas and representative of the near-field electromagnetic radiation emitted by the phased array antenna are supplied to an evaluating circuit which gives indication of the performance of the electronic system of the phased array antenna. A control circuit is employed for energizing the testing antennas in any desired manner to issue electromagnetic radiation toward the phased array antenna being tested. A polarimeter is used to accurately determine the polarization capabilities of the antenna over a wide bandwidth.
REFERENCES:
patent: 3199107 (1965-08-01), Mills
patent: 3378846 (1968-04-01), Lowenschuss
patent: 3560976 (1971-02-01), Foldes
patent: 3604000 (1971-09-01), Briana et al.
patent: 4521780 (1985-06-01), Preikschat
ITT Avionics
Sikes William L.
Twomey Thomas N.
Werner Mary C.
Wimer Michael C.
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