Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1977-03-14
1978-10-17
Smith, Alfred E.
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343853, H01Q 326, H01Q 2100
Patent
active
041212215
ABSTRACT:
A radio frequency array antenna system wherein an array of antenna elements in a multibeam array antenna is coupled to one of a pair of beam forming networks and a portion of such antenna elements is coupled to another one of the pair of beam forming networks. Radio frequency amplifiers are coupled between the array of antenna elements and the pair of beam forming networks. The beam forming network which is coupled to only a portion of the antenna elements is used in the transmission of continuous wave radio frequency energy and the other beam forming network is used in the transmission of pulsed radio frequency energy. During transmission of the continuous wave energy only the portion of the radio frequency amplifiers coupled to the corresponding beam forming network is powered and during transmission of pulse modulated radio frequency energy all of the radio frequency amplifiers are supplied with power. With such arrangement the power required for the multibeam array antenna system is reduced and activation of the radio frequency amplifiers which are used to transmit pulsed energy produces minimum intermodulation of continuous wave energy being transmitted.
REFERENCES:
patent: 3435453 (1969-03-01), Howard
patent: 3806932 (1974-04-01), Dietrich et al.
patent: 3916417 (1975-10-01), Wong et al.
Barlow Harry E.
Pannone Joseph D.
Raytheon Company
Sharkansky Richard M.
Smith Alfred E.
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