Browse Prior Art Database

LOW PROFILE SHIELDED ANTENNA CONNECTOR

IP.com Disclosure Number: IPCOM000008339D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-Jun-07
Document File: 2 page(s) / 106K

Publishing Venue

Motorola

Related People

Martin J. Kimbell: AUTHOR [+2]

Abstract

Existing radiotelephones, such as. cellular telephones, employ an antenna. The antenna is electrically connected to radio circuitry disposed on the printed circuit board (PCB) of the radiotele- phone. Such connection may be accomplished via a connector disposed on the PCB, which mates with the antenna.

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 50% of the total text.

Page 1 of 2

MO-LA Technical Developments

LOW PROFILE SHIELDED ANTENNA CONNECTOR

by Martin J. Kimbell and Scott Semenik

STATEMENT OF PROBLEM

  Existing radiotelephones, such as. cellular telephones, employ an antenna. The antenna is electrically connected to radio circuitry disposed on the printed circuit board (PCB) of the radiotele- phone. Such connection may be accomplished via a connector disposed on the PCB, which mates with the antenna.

  The antenna transmits and receives radio signals. Radio signals present at the connector are capable of "leaking" into the,radio circuitry. Stray radio signals can impede and degrade the performance of sensitive electrical components comprising the radio circuitry.

SOLUTION

  A shielded connector 100, shown in Figure I, may be used in a radiotelephone (not shown) to minimize "leaking" of antenna signals. The shielded connector 100 is a coaxial-type connector having a length L of approximately 5.5 mm, a width W of approximately 3 mm, and a height H of approxi- mately 1.5 mm. Because of its constrained dimen- sions and low profile, the shielded connector 100 may be advantageously used in handheld portable radiotelephones.

  For viewing purposes, a cross-section of the shielded connector 100 along its longitudinal axis has been taken in Figure 1. The shielded connector 100 comprises a metallic female-type connector 102. A metallic signal lead 104 extends from the rear of the female-type connector 102. An insulating layer 106, comprised of high temperature plastic, contacts and radially surrounds the female-type connector 102. A sheet metal casing 108 contacts and surrounds the insulating layer 106.

  The shielded connector 100 is seated on a PCB 110. The PCB 1 IO comprises a metallic ground pad I12 and a metallic signal pad 114. The metallic ground pad 112 is electrically connected to an electrical ground (not shown) via metallic traces (not shown) disposed in the PCB 110. The ground pad I1 2 is sized to correspond to the footprint of the shielded connector 100, as defined by the casing 10...