Antenna assembly

Details Antenna assembly Antenna assembly

1992-10-15

1994-05-17

Hille, Rolf

Communications: radio wave antennas

Antennas

Plural separate diverse type

343853, 343859, H01Q 21240, H01Q 9004, H01Q 1520

Patent

active

053132181

ABSTRACT:
An antenna assembly includes a dipole antenna (D1, D2) and a monopole antenna (C1) having substantially perpendicular polarization directions. The dipole antenna (D1, D2) is provided with a balun (E1, E2) a portion (E1) of which serves as a backplane for a microstrip transmission line (G0, G1, G2) which transmits RF signals. The microstrip transmission line includes a first portion (G0) connected to a coaxial feed cable (F), a second portion (G1) having its ends respectively connected by a first switch (A) to the monopole antenna (C1) and a second switch (B) to the balun portion (E1) and a third portion (G2). When the switches (A, B) are closed to render the monopole antenna (C1) operative, the third portion (G2) serves to detune the dipole antenna (D1, D2). The assembly may be formed as a two-sided printed circuit board.

REFERENCES:
patent: 4062017 (1977-12-01), Thompson
patent: 4395714 (1983-07-01), Takeda et al.
patent: 4825220 (1989-04-01), Edward et al.
patent: 5005023 (1991-04-01), Harris
UTICA Communications Corporation Advertisment, Gizmotchy-2 in 1-C-B Beam, 1 page, 1965.
Book, Principles of Antenna Theory, by Kai Fong Lee, pp. 114 & 115, (New York; John Wiley and Sons, 1984).

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