Apparatus for measuring a spatial angle to an emitter using squi

Details Apparatus for measuring a spatial angle to an emitter using squi Apparatus for measuring a spatial angle to an emitter using squi

1995-06-09

1997-03-04

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342362, 342432, 342442, G01S 502, G01S 504, H01Q 2106

Patent

active

056084110

ABSTRACT:
An apparatus for determining a spatial angular reference to an emitter of RF signals, such as direction of arrival or angle of arrival, from phase measurements made between two antennas is described. The apparatus uses at least a pair of dual polarized antennas having non-parallel boresights. Like polarized outputs from the antennas produce phase information which is stored and then summed to remove bias error in favor of the sin (AOA) component, while the phase information from the like polarized antennas is also differenced producing a signal indicative of the bias error. It is shown that the bias error can be uniquely related to emitter angle and azimuth. The latter information is obtained without the need for making emitter frequency measurements.

REFERENCES:
patent: 3824595 (1974-07-01), Hall
patent: 5541608 (1996-07-01), Murphy et al.

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