AM/FM antenna system

• US 3,987,448 A
• Filed: 05/08/1975
• Issued: 10/19/1976
• Est. Priority Date: 05/08/1975
• Status: Expired due to Term

• Current Assignee: Lawrence Peska Associates, Inc.
• Original Assignee: Lawrence Peska Associates, Inc.
• Inventors: Scheppman, Ronald K.
• Primary Examiner(s): Lieberman, Eli
• Application Number:
  US05/575,545
• Time in Patent Office: 530 Days
• Field of Search: 325/315, 325/370, 343/702, 343/726, 343/728, 343/788
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/24 with receiving set

Abstract

An antenna system improvement for a conventional AM/FM radio having a ferrite coil antenna for AM and other antenna such as a telescoping whip for FM feeding an FM antenna input, includes a pair of terminals adapted to be connected to an external antenna lead in wire, an auxiliary coil wrapped around the ferrite antenna and a single pole double throw switch for connecting either the auxiliary coil or the FM antenna input to the terminals.

Claims

1. In an AM/FM radio receiver within a housing having a ferrite coil antenna for AM and another distinct antenna means for FM coupled to an FM input the improvement comprising:

a pair of terminals on said housing adapted to be connected to an external antenna, an auxiliary coil wrapped around said ferrite antenna in inductive coupling relationship thereto, and a single pole double throw switch having a wiper connected to one of said terminals and a pair of contacts, associated with said wiper, respectively connected to said auxiliary coil and to said FM antenna means for coupling either said auxiliary coil or said FM antenna means to said terminals.