The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1979
Filed:
Dec. 23, 1977
Joseph G DiTullio, Woburn, MA (US);
Leonard I Parad, Framingham, MA (US);
Donald J Sommers, Brookline, NH (US);
GTE Sylvania Incorporated, Stamford, CT (US);
Abstract
A microwave diplexer apparatus for handling simultaneously two independent polarized transmitted signals at one frequency and two independent polarized received signals at a lower frequency. In the transmit mode of operation, a pair of input signals are applied to a first orthogonal mode transducer wherein the electric fields of the signals are established at right angles to each other. The orthogonal, linearly-polarizer signals are then transformed by a pin/ridge-loaded circular polarizer device to oppositely-rotating circularly-polarized signals and coupled via an antenna port of a second orthogonal mode transducer to an antenna for transmission to a desired target. In the receive mode of operation, a pair of independent oppositely-rotating circularly-polarized signals from the target are received and coupled via the antenna port of the second orthogonal mode transducer to other ports of the second orthogonal mode transducer to which two pairs of arms are coupled for the passage therethrough of orthogonal vectoral components of the circularly-polarized signals. The two pairs of arms are coupled to corresponding magic tee hybrid devices wherein the orthogonal vectoral components derived from the circularly-polarized signals in the pairs of arms are combined and applied to corresponding pin-loaded polarizer devices wherein a phase shift differential of 90.degree. is introduced to the vectoral components in the pairs of arms. The vectoral components from the polarizer devices are applied to another magic tee hybrid device wherein a pair of resultant signals corresponding to the two circularly-polarized signals are derived.