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INTEGRAL EXTERNAL ANTENNA AS AN ESCUTCHEON OR LABEL FOR A WIRELESS FIXED ACCESS UNIT

IP.com Disclosure Number: IPCOM000004715D
Original Publication Date: 2001-Apr-18
Included in the Prior Art Database: 2001-Apr-18
Document File: 2 page(s) / 6K

Publishing Venue

Motorola

Related People

James Talmage Davis II: AUTHOR [+3]

Abstract

INTEGRAL EXTERNAL ANTENNA AS AN ESCUTCHEON OR LABEL FOR A WIRELESS FIXED ACCESS UNIT

This text was extracted from a RTF document.
This is the abbreviated version, containing approximately 80% of the total text.

INTEGRAL EXTERNAL ANTENNA AS AN ESCUTCHEON OR LABEL FOR A WIRELESS FIXED ACCESS UNIT

by James Talmage Davis II, Son Quang Le and Roger Paul Gandee

Radio/phone communications equipment requires an antenna to transmit and receive data. Typically the antenna is a feature which protrudes from the product externally. Many people feel that the antenna detracts from the appearance of the communications equipment and/or creates difficult mounting conditions.

External antennas are also subjected to being damaged since they protrude away from the product.

The antenna connection scheme can also be complex for an external antenna. A typical external antenna assembly will include: a wire attachment to the printed circuit board directly or to a mounted component on the PCB; a weather sealed bushing, comprising of a bushing, seal and nut, (these typically require tools for installation); and the antenna itself, is usually an over-molded antenna. This external design creates many piece parts, which in turn affect cost and Design For Assembly.

In order to minimize cost and the appearance of an external antenna, internal antennas have been created on PCB's, flexes, antennas or wires have been mounted directly to the PCB inside the unit, etc. However, this alternative approach usually requires that the overall size of the product becomes larger, and it is also required that the material for the outer housing cannot be metal, (i.e. castings, sheet metal cabinets, etc.).

Internal antennas also tend to not perform as well as external antennas, coverage is limited.

It would be beneficial to have an antenna that would be external in nature, so that the communications device could have:

A- An overall product size which could be small and not increased due to an internal antenna.

B- An antenna that would not detract from the appearance of the unit.

C- An antenna that did not have the complexity of typical antennas, usually with increased cost many piece parts and labor.

D- An antenna that would not hamper installations of the communications equipment due to antenna protrusion.

E- A housing that could be made from metal for environmental and vandalism protection.

F- An antenna that would not be damaged or broken off through misuse of the product.

Most radio/phone communications devices contain a label of some kind indicating the name or something about the product, such as the TeleDensity WFAU product. The idea is to make the label be an antenna, yet look like a label. The label or escutcheon would look like a typical escutcheon containing artwork; however, on the back side of the label circuitry of an antenna pattern would be deposited.

This circuitry would be connected to the main printed circuit board by means of a sheet metal contact which makes a wiping connection to the antenna circuitry or by means of a rubber "Fuji-type" conductor. (See ...