ANTENNA WITH PLANAR LOOP ELEMENT

• US 20140320368A1
• Filed: 04/24/2014
• Published: 10/30/2014
• Est. Priority Date: 04/24/2013
• Status: Abandoned Application

• Current Assignee: Jeffrey Thomas Hubbard
• Original Assignee: Jeffrey Thomas Hubbard
• Inventors: Hubbard, Jeffrey Thomas
• Application Number:
  US14/261,396
• Publication Number:
  US 20140320368A1
• Time in Patent Office: Days
• US Class Current: 343/834
• CPC Class Codes: H01Q 19/00 Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic combination of horns with slotted waveguide array H01Q13/0233
• CPC Class Codes: H01Q 19/10 using reflecting surfaces
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

An antenna for wideband operation comprises a planar loop element having a total-length-to-width ratio below about 50:1. In one embodiment, a plurality of planar loop elements are arranged in a Yagi array having a single active element. The dimensions of the elements are chosen to achieve substantially resistive impedance over greater than a thirty percent bandwidth and a minimum gain of 6.5 dB over isotropic response.

Claims

1. An antenna, comprising:

a resonant planar loop active element, having means for connecting the element to a transmitter or receiver, the element having a plurality of sides with length and width dimensions defining a total-length-to-width ratio below about fifty to one.

2. The antenna of claim 1, further comprising at least one parasitic element arranged parallel to the plane of the active element and spaced along an array axis transverse to the active and parasitic element.

3. The antenna of claim 1, wherein the total-length-to-width ratio of the active element is below about thirty to one.

4. The antenna of claim 2, wherein one of the at least one parasitic elements is a reflector, the reflector being either a resonant loop element or a reflecting plane.

5. The antenna of claim 3, further comprising at least one parasitic element arranged parallel to the plane of the active element and spaced along an array axis transverse to the active and parasitic elements.

6. An antenna, comprising:

a thin resonant planar loop active element, having means for connecting the element to a transmitter or receiver, the element having a plurality of sides with length and width dimensions defining a total-length-to-width ratio below about fifty to one;

at least one parasitic element arranged parallel to the plane of the active element and spaced along an array axis transverse to the active and parasitic element.

7. The antenna of claim 6, wherein one of the at least one parasitic elements is a reflector, the reflector being either a resonant loop element or a reflecting plane.