Tuners – With switching means – Inductor only modified or substituted by switching
Patent
1987-05-01
2000-12-19
Issing, Gregory C.
Tuners
With switching means
Inductor only modified or substituted by switching
334 77, 333 32, H03J 320
Patent
active
061632384
ABSTRACT:
A variable RF inductor network having a plurality of coaxial cables with their respective outer conductors in electrical contact with each other, thereby forming a common outer conductor. This common outer conductor is connected to an RF ground and an RF source. An RF choke is formed between the RF ground and RF source by winding the coaxial cables around a first of a series of inductor cores. The coaxial cables are then wound serially about the remaining succession of inductor cores to form serial, separate inductors. At each separate inductor core, one of the cables is terminated and the inner conductor of the terminated cable is connected to a PIN diode switch for switching the particular inductor out of the network by shorting the common outer conductor across the core. The inner conductors are connected to a biasing means for individually controlling each PIN diode switch to selectively switch particular inductors in and out of the network.
REFERENCES:
patent: 4072900 (1978-02-01), Ray
patent: 4339827 (1982-07-01), Torres et al.
patent: 4361909 (1982-11-01), Theriault
patent: 4367557 (1983-01-01), Stern et al.
patent: 4461032 (1984-07-01), Skerlos
patent: 4502025 (1985-02-01), Carl, Jr. et al.
patent: 4564843 (1986-01-01), Cooper
Issing Gregory C.
Lenzen, Jr. Glenn H.
Raufer Colin M.
Raytheon Company
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