Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1977-02-08
1978-12-26
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
G01S 944
Patent
active
041318897
ABSTRACT:
A doppler radar system comprises a solid state microwave source which is pulsed on and off with a duty cycle typically around 10.sup.-3. The microwaves are transmitted towards a nearby target with a small amount supplied to a mixer also supplied with signals received from the target. The mixer output is passed through a gate opened in coincidence with the mixer pulsed output, and supplied to an integrator whose output forms a doppler signal representing target velocity. Target directionality is found by providing two channels fed in quadrature phase.
REFERENCES:
patent: 3217323 (1965-11-01), Fackler et al.
patent: 3234548 (1966-02-01), Colby, Jr.
patent: 3314065 (1967-04-01), Steigerwalt et al.
patent: 3432855 (1969-03-01), Kalmus
patent: 3727227 (1973-04-01), Takao et al.
patent: 4012730 (1977-03-01), Nicholls
patent: 4035798 (1977-07-01), Hackett
Hubler Malcolm F.
National Research Development Corporation
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