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AN ANTENNA COMBINED WITH A SHOCK ABSORBER (ELASTOMER MATERIAL)

IP.com Disclosure Number: IPCOM000005995D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-23
Document File: 1 page(s) / 49K

Publishing Venue

Motorola

Related People

Mostafa Hedayatnia: AUTHOR [+3]

Abstract

The present trend in the communication industry is toward reduction of the product size. As the available wlume within the product is reduced it becomes more critical to protect sensitive components from mechanical shock and vibration. This reduction in size also limits the available antenna aperture.

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MOTOROLA Technical Developments Volume 11 October 1990

AN ANTENNA COMBINED WITH A SHOCK ABSORBER (ELASTOMER MATERIAL)

by Mostafa Hedayatnia, Rodney Whaley, and Eric Eaton

   The present trend in the communication industry is toward reduction of the product size. As the available wlume within the product is reduced it becomes more critical to protect sensitive components from mechanical shock and vibration. This reduction in size also limits the available antenna aperture.

   To overcome this problem it would be advantageous to combine a shock absorbing material with a component inside the product. One component which could incorporate a shock absorber is the antenna. In the past, when size was not a problem, the shock absorbing material was placed in the area surrounding the antenna. An alternative would be to add a non-conductive elastomer, such as silicone, to the area within the antenna loop. This will allow maximum antenna aperture while still protecting fragile components against shock and vibration.

   Silicone does not stay deformed after the applied force has been removed (it does not have a memory). It also performs as a good shock absorber inside the radio. Combined metal and elastomer material in different shapes and sizes are available from different vendors. Gold, copper, or nickel plating with different skin deep can also be provided. This part can easily be soldered to a PCB.

The following Figure shows a typical usage of such an Elastomer Antenna in a f...