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Frequency-selective-antenna

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Frequency selective antenna

Details

Inventors: Stephens, Kenneth D.;
Assignee: Communications Design Group, Inc. (Nashville, TN)
Primary Examiner: Lieberman; Eli
Assistant Examiner: Wimer; Michael C.
Attorney, Agent or Firm: Lyon & Lyon

There is disclosed herein an antenna, particularly for use at high frequencies such as approximately one gigahertz and above, which is frequency selective. The antenna design allows signals at a given frequency to be preferentially received, as distinguished from broadband reception. The antenna design can be modified for reception of signals of different given frequencies. The antenna comprises a plurality of parabolic sections in the form of concentric rings or segments with each segment being offset axially from the next adjoining segment to thereby provide an antenna which is relatively flat, or having a low profile, as compared to a standard parabolic antenna. The surface of each segment is a segment of a different focal length parabola, but with each parabolic surface being a function of the signal wavelength (or frequency) to be received by the antenna. The antenna may be round, rectangular or have other shapes. Also disclosed are feed and pick-up arrangements for the antenna. In addition to the frequency selective characteristic of the antenna it can be made from various materials and is relatively simple to manufacture, and its low profile minimizes wind loading and mounting problems, and the like.

DETAILED DESCRIPTION According to the present invention, there is provided an improved form of frequency selective antenna.
Another feature of the present invention is the provision of a frequency selective antenna for use with relatively high frequency signals and which is relatively thin or has a narrow profile.
Another feature of the present invention is the provision of an antenna which is relatively simple to construct.
A further feature of the present invention is an improved antenna which can be simply designed to preferentially receive signals of various frequencies.

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