Dual frequency feed apparatus

• US 4,829,315 A
• Filed: 01/21/1987
• Issued: 05/09/1989
• Est. Priority Date: 01/21/1987
• Status: Expired due to Fees

• Current Assignee: William T. Cookman
• Original Assignee: William T. Cookman
• Inventors: Cookman, William T.
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Johnson, Doris J.
• Application Number:
  US07/006,005
• Time in Patent Office: 839 Days
• Field of Search: 343/779, 343/786, 343/783, 343/784, 343/786, 343/799, 343/772, 343/840
• US Class Current: 343/779
• CPC Class Codes: H01Q 5/45 using two or more feeds in association with a common reflecting, diffracting or refracting device

Abstract

The invention comprises a switching mechanism for a micro wave signal dish receiver apparatus. The mechanism has means for switching a wave guide of a 12 GHZ frequency signal into and out of concentric alignment with the center of a 4 GHZ wave guide of the apparatus. The 12 GHZ wave guide when switched out of alignment is retracted so as not to interfere with the 4 GHZ wave guide while the 4 GHZ wave guide is made operative to receive a signal of that frequency. The mechanism can project the 12 GHZ guide into the center of the 4 GHZ wave guide to receive a signal of a 12 GHZ frequency at the same focal point substantially as the focal point of the 4 GHZ, without the 4 GHZ wave guide interfering with the 12 GHZ wave guide operation.

Claims

1. A waveguide switching mechanism for a signal receving apparatus comprising a microwave reflecting dish having a concave surface, a sleeve mechanism mounted to the center of the concave portion of the dish, a first amplification system for amphlifying large signals, a second amplification system for amplifying small signals, said sleeve comprising a large sleeve, said large sleeve having an opening at its forward end for receiving a large wave signal collected by said dish and having a lateral opening rearward in the sleeve to allow the large signal to leave the large sleeve, a deflecting plate movably mounted to be positioned at an acute angle diagonally acros the large sleeve so that its front face can deflect the large signal laterally out the lateral opening in the large sleeve to be received and amplified by the amplification system for large signals, a pair of small sleeves, one of said sleeves being mounted in telescoping relation to the other with the other small sleeve fixed to the back face of the deflecting plate, said small sleeves having their center axes parallel to the plane of the back face of the deflecting plate, levering means having one end connected to said one small sleeve, means to move said levering means whereby said levering means acts to position said one small sleeve retracted into the other small sleeve when the plate is diagonally across the large sleeve to facilitate the diagonal positioning of the plate, said levering means acting to lever said one small sleeve forward from said retracted position with said forward levering movement of the one small sleeve telescoping said one small sleeve forward of the other while pivoting the plate into parallel alignment with the center axis of the large sleeve and pivoting the small sleeves on the plate so that their axes are pivoted into concentric alignment with the axis of the large sleeve with the forward end of the one small sleeve adjacent the forward open end of the large sleeve so that the small sleeves may guide a small signal centrlly through the larger sleeve to the second amplification system for amplification of small signals.

2. A signal guide device for a signal receiever apparatus comprising a signal reflecting dish, said dish having a concave surface, a signal guide sleeve mechanism mounted to the center of the concave surface portion of the dish to receive signals collected by said dish at its forward end, said mechanism having a large stationary sleeve having an open forward end to recieve a large signal collected by said dish, said large sleeve having a lateral opening rearward of said forward open end for allowing the large signal to leave the sleeve, a pivotally mounted deflection plate pivotally mounted inside the large sleeve adjacent the lateral opening and adapted to be pivoted into a position diagonally across the lrge sleeve to deflect a large signal out of said lateral openng, a first amplification system for amplifying a large signal for amplifying a large signal deflected out of said lateral opening and mounted adjacent said lateral opening, a pair of small sleeves with one mounted to the rear face of said deflecting plate with the longitudinal axes of the small sleeves parallel with the face of said plate, the other of said small sleeves being retractable into the one small sleeve in telescoping relation to the one small sleeve to facilitate the positioning of said deflecting plate diagonally across the large sleeve, a second amplification system for amplifying a small signal mounted rearward of said deflecting plate, lever means having an end portion mounted to said other of said small sleeves whereby movement of said lever means will move said other sleeve forward which will pivot said deflecting plate from its diagonal position into parallel alignment with the longitudinal axis of the large sleeve and will pivot said one small mounted to said plate and said other small sleeve mounted to said one small sleeve into a position where their longitudinal axes are in parallel concentric alignment with the longitudinal axis of the large sleeve and telescope said other small sleeve forward until its forward end is adjacent the forward open end of the small sleeve for receiving a small signal collected by said dish through said small sleeves into the second amplificaiton system for amplifying the small signal.