Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Radio

Planar-serpentine-antennas

Copper composites directly bonded to ceramics

The present invention utilizes a copper composite substrate which is directly bonded to a ceramic ...

Methods for bonding structurally dissimilar optical discs

This and other objects of the invention are accomplished in accordance with the principles of the ...

New materials for bone replacement and for joining bones or prostheses

We claim: 1. A composition for replacing bone, joining bones and for implanting prosthesis material ...

Signal processor

With this background of the invention in mind, it is therefore an object of this invention to ...

Imaging apparatus having start-of-imaging signal dependent color temperature measurement for white-balance

It is a primary object of the present invention to provide an imaging apparatus capable of reducing ...

Analog-to-digital converter with multiplexed input channels

In accordance with one embodiment of the present invention, a circuit includes an analog-to-digital ...

Method for making a circuit board and article made thereby

What we claim as new and desire to secure by Letters Patent of the United States is: 1. A method ...

Method for producing a metallic pattern upon a substrate

This invention relates to methods for producing metallic patterns upon substrates. The invention is ...

Method for manufacturing printed circuits comprising printing conductive ink on dielectric surface

This invention features the method of producing printed circuits on a board and boards made thereby ...

Connector assembly with resinous material securing electrical cable

As illustrated in FIG. 1, a cable connector assembly in accordance with this invention comprises ...

Planar serpentine antennas

Details

Inventors: Shoemaker, Kevin O.;
Assignee:
Primary Examiner: Wimer; Michael C.
Assistant Examiner:
Attorney, Agent or Firm: Fields, Lewis, Pittenger & Rost

Planar serpentine antennas disclosed include a generally flat, non-conductive carrier layer and a generally flat radiator of a preselected length and arranged in a generally serpentine pattern that is secured to a surface of the carrier layer. One form of the antenna disclosed that is particularly suited for vehicle transceivers and mounting on a vehicle window in a stick-on fashion has a series of change of direction points characterized by a succession of right angle turns and back folds to obtain substantially the greatest length in the smallest surface area. Another form of the antennas disclosed that are particularly suited for AM/FM radios, stereos, etc. have a sinuous pattern with radiator sections in parallel spaced relation to one another and further are connected at opposite ends in curved back folds. At least one and sometimes a pair of flat ground conductors are secured to a surface of the carrier layer in the same manner as the radiator to optimize the impedance match between a connecting cable and the radiator.

DETAILED DESCRIPTION The formulas for determining the length of the radiator of an antenna for the present invention are: ##EQU1## To shorten the radiator of quarter wavelength antennas inductors or inductor/capacitor combinations are added.
Antennas made according to the present invention can be made to resonate across a very wide frequency range as from about 1 Mhz to 2 Ghz.
Referring now to FIGS.
1-5 there is shown a planar serpentine antenna 20 embodying features of the present invention.
The antenna shown has a generally flat or substantially planar, generally rectangular, flexible, non-conductive carrier layer C.
The term "generally flat or substantially planar" as used herein to define the antenna and the carrier layer is intended to refer to both straight and curved planar surfaces.
The antenna and carrier layer is flexible so it may conform to the shape of many different surfaces on which an antenna may be mounted so the antenna may also be referred to as conformal to a supporting surface.
An example of a flexible sheet material found suitable for use as carrier layer C is as follows:
______________________________________
Mylar
______________________________________
Dielectric Constant @ 10.
sup.
6 hz
2.
3-2.
6
Dissipation Factor @ 10.
sup.
6 hz
.
01-.
03
Water Absorption, %, 1/16"
.
2-.
4
Thickness .
001-.
005 in.

.
003 in.
preferred
______________________________________
A thin, flat radiator R is secured to one surface of the carrier layer C.
This radiator R has opposite ends herein designated for reference purposes as a first end 21 and a second end 22.
The radiator has an end section 23 at the first end 21 that makes it suitable for connecting with a connector portion of a plug-in connector.
A length of non-radiating section 24 is shown between an end section 23 and a straight first energy radiating radiator section 1 discussed hereinafter.
The non-radiating section 24 shown has six relatively short, parallel, spaced, straight sections with back folds at the ends and arranged in a sinuous pattern

Related patents

	Integrated retroreflective electronic display To overcome the limitations in the prior art described above, and to overcome other limitations that will become apparent upon reading and understanding the present ...
	Unitary elastic muffler assembly for a pneumatic device I claim: 1. A unitary, elastic muffler assembly adapted for telescopic engagement with the tubular housings of variously sized pneumatic devices exhausting spent working ...
	Perfumery compositions We claim: 1. A perfumery composition comprising 3,3-dimethyl-1,5-dioxaspiro [5,5] undecane and a perfumery composition carrier. 2. A composition according to claim 1 ...
	Chemical bonding of metals to ceramic materials We claim: 1. A method for chemically bonding a body of a refractory oxide ceramic selected from the group consisting of oxides of metals of groups II, III, IV and VIII ...
	Method for directly joining metal pieces to oxide-ceramic substrates It is an object of the invention to provide an improved method for the direct joining of metal pieces to oxide-ceramic substrates, in which a substantially bubble-free ...
	Method for directly bonding ceramic and metal members and laminated body of the same OF THE PREFERRED EMBODIMENTS The present invention is based upon a finding that, if the surface of a ceramic member is surface-treated with a bonding agent or is bonded ...
	Abradable strain-tolerant ceramic coated turbine shroud Accordingly, it is an object of the invention to provide an improved high pressure gas turbine capable of operating at substantially higher efficiency over a longer ...
	Method of producing a composite oxide superconductive wire In order to achieve the first object mentioned above, the present invention provides a method of producing a superconducting wire, comprising the steps of continuously ...
	Microlaminated composites and method A particular advantage of microlaminate manufacture in accordance with the invention is that the usual sequence of fabrication, i.e., ceramic densification after ...
	Ceramic armor From a thorough investigation of the mechanical properties of a range of structural ceramics, one property has been discovered which sets TiB.sub.2 apart from other ...

0.014
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved