Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1973-06-14
1976-07-20
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 10, 343117R, G01S 338, G01S 902
Patent
active
039710190
ABSTRACT:
A communications or radar radio receiver, of modified superheterodyne design, that will accept and process unknown radio frequency (R.F.) signals without the necessity of concurrent tuning of the R.F. stage(s) and adjustment of the local oscillator to a frequency proportional to the carrier frequency. The radio receiver employs a rotatable directional receiving antenna having adequate directivity indices to isolate and discriminate between adjacent signals in angular coordinates. When used in radar receiver applications in combination with an off-set frequency transponder, range and bearing can be obtained without resorting to a common specific frequency requirement for both radar and transponder. In such a case the servo of the radar receiver is used to position the antenna for detection of the carrier signal thereby providing an azimuth indication of the position of the unknown transmitter. If the receiver does not have a servo, the antenna can be selectively rotated by some other means for a maximum received signal to indicate azimuth.
REFERENCES:
patent: 2468751 (1949-05-01), Hansen et al.
patent: 3137853 (1964-06-01), Cutler
patent: 3162851 (1964-12-01), Kamen et al.
patent: 3171094 (1965-02-01), Geren et al.
patent: 3365715 (1968-01-01), Stoney
patent: 3453617 (1969-07-01), Begeman et al.
Beers R.
Hubler Malcolm F.
Sciascia R.
Sheinbein S.
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