Browse Prior Art Database

Four By Four Matrix Transmission Line Switch

IP.com Disclosure Number: IPCOM000084676D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Hoffmann, HG: AUTHOR

Abstract

This printed-circuit packaging technique simplifies construction and reduces cost of multitransmission line switching arrangements.

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Four By Four Matrix Transmission Line Switch

This printed-circuit packaging technique simplifies construction and reduces cost of multitransmission line switching arrangements.

A switch 10 for a 600 MHz bandwidth signal comprises two printed-circuit boards 12,14 having metal foil 16 on both sides before etching. One of the boards 12 is soldered to a conventional edge connector section 18 and the other board 14 is bobbed for most applications. The edge connector section 16 is for control purposes only and normally carries a diode network for decoding as well as for noise suppression.

The two boards 12,14 are identical and laid out syrmetrically with respect to the transmission line interconnector locations.

Coaxial transmission line connectors 20 are arranged on one side of each board. Relays 22 are arranged on that one side of each board with the printed- circuit terminals thereof protruding through the boards. The boards 12 and 14 are separated by a distance a bit larger than the height of two relays. This separation is maintained conveniently by transmission line connectors 24,26 which interconnect the high-frequency circuitry and support the board 14 on the board 12.

Male connectors 24 and female connectors 26 are soldered on each board at locations, whereby the male connectors 24 on one board mate with the female connectors 26 on the other when the boards are facing each other. Preferably, these connectors are identical to the connectors used in the circuit w...