Browse Prior Art Database

High Frequency Relay Matrix

IP.com Disclosure Number: IPCOM000061274D
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Horel, TA: AUTHOR [+3]

Abstract

A relay matrix is described wherein multiple connections between two groups of high frequency lines are made while maintaining high bandwidth and constant impedance with low insertion loss. Input planes are arranged as vertical parallel cards and output planes are arranged as horizontal parallel cards with a constant electrical length maintained through the matrix, each of the planes using microstrip transmission lines to interconnect relays. Fig. 1 suggests a model having eight vertical input cards and eight identical horizontal output cards, each card being comprised of seven, single-pole, double-throw (SPDT) relays (encircled numbers) interconnected by microstrip transmission lines (straight lines).

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 70% of the total text.

Page 1 of 2

High Frequency Relay Matrix

A relay matrix is described wherein multiple connections between two groups of high frequency lines are made while maintaining high bandwidth and constant impedance with low insertion loss. Input planes are arranged as vertical parallel cards and output planes are arranged as horizontal parallel cards with a constant electrical length maintained through the matrix, each of the planes using microstrip transmission lines to interconnect relays. Fig. 1 suggests a model having eight vertical input cards and eight identical horizontal output cards, each card being comprised of seven, single-pole, double-throw (SPDT) relays (encircled numbers) interconnected by microstrip transmission lines (straight lines). The eight vertical cards each have a single input (In) and eight output (Out) connections, each of which is connected to the input of a different horizontal output card. Each output card has eight input connections and a single output connection. Connections are made by selecting joining paths between the desired input and output planes. The constant impedance characteristics of the connections are maintained since the binary tree structure of the cards allows only one possible path for a given set of inputs and outputs. Although cards are identified as "input" or "output", information flow can be bidirectional. Models having 32 input and 32 output cards, each card comprised of 31 SPDT relays in the binary tree organization, have been co...