Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1980-01-17
1982-03-09
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5DD, 343 5HM, 343 5TM, G01S 1358
Patent
active
043192440
ABSTRACT:
In a Doppler radar system for measuring the velocity of a vehicle, such as an automobile, in order to lessen interference with external electric wave appliances, such as radios and televisions, caused by transmitting microwaves, one of the higher harmonics generated from a mixer diode driven by the fundamental waves of a local oscillator is selected by a filter for transmission and is used as the transmission output wave, whereby the power of the transmission waves is remarkably reduced in comparison with the mixer driving power.
REFERENCES:
patent: 4217585 (1980-08-01), Fishbein et al.
Endo Akira
Hirota Yukitsugu
Kaneko Yoichi
Kimura Katsuhiro
Sekine Kenji
Hitachi , Ltd.
Nissan Motor Co,. Ltd.
Tubbesing T. H.
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