Dual frequency antenna

Details Dual frequency antenna Dual frequency antenna

1977-01-10

1978-05-09

Smith, Alfred E.

Communications: radio wave antennas

Antennas

With ground connection spaced from feed line connection

343830, H01Q 900

Patent

active

040890058

ABSTRACT:
First and second elements mounted in parallel spaced apart relation with one end shorted to form a quarterwave transmission line at a base frequency and a halfwave transmission line at an even harmonic thereof, with the spacing being .lambda./8 at the base frequency and .lambda./4 at the harmonic and a feedline being connected between the elements and positioned so the impedance of the antenna matches the impedance of the feedline at the base frequency and the diameter of the feedline being adjusted so the impedance of the antenna matches the impedance of the feedline at the harmonic frequency.

REFERENCES:
patent: 3343089 (1967-09-01), Murphy et al.
patent: 3623161 (1971-11-01), Fujimoto et al.
patent: 3838429 (1974-09-01), Reggia

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