Transmission line coupling device with closed impedance matching

Details Transmission line coupling device with closed impedance matching Transmission line coupling device with closed impedance matching

1989-11-16

1992-01-21

LaRoche, Eugene R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343860, 343715, 333 24C, 333 32, 333 33, H03H 1128, H01Q 916

Patent

active

050831364

ABSTRACT:
A transmission line coupling device comprising a pair of coils each having an electrical length of one half of the wave length of transmitted frequency. Respective ends of the coils are connected together to give a full wave loop. The outside shielding of the transmission cable is connected to one end of the coils so that the coils have generally ground potential at their ends. The midpoint of the coils have maximum voltage, and the center conductor of the transmission line is connected to a point on one coil having an impedance matching that of the transmission line. The other coil is capacitively coupled in some fashion to the antenna.

REFERENCES:
patent: 1778395 (1930-10-01), Lindenblad
patent: 2190131 (1940-02-01), Alford
patent: 2204175 (1940-06-01), Carter
patent: 2226686 (1940-12-01), Alford
patent: 2448036 (1948-08-01), Libby
patent: 2829367 (1958-04-01), Rychlik
patent: 4238799 (1980-12-01), Parfitt
patent: 4764773 (1988-08-01), Larsen et al.
patent: 4935746 (1990-06-01), Wells

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