Wideband microstrip antenna

• US 6,154,175 A
• Filed: 03/22/1982
• Issued: 11/28/2000
• Est. Priority Date: 03/22/1982
• Status: Expired due to Term

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Yee, James S.
• Primary Examiner(s): Blum, Theodore M.
• Application Number:
  US06/360,310
• Time in Patent Office: 6,826 Days
• Field of Search: 343/700 MS, 343/705, 343/753, 343/708, 343/785, 343/911 R
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 3/02 using mechanical movement of antenna or antenna system as a whole
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: H01Q 9/0428 radiating a circular polarised wave

Abstract

A wideband antenna element includes a conductive plate parallel to, and spaced from a ground plane. A tapered dielectric material is positioned between the plate and ground plane. A pair of driving points to the plate are positioned fixed distances on either side of a center interconnect point between the plate and ground plane, to effect staggered tuning of the antenna element.

Claims

1. A microstrip antenna comprising:

a conductive element ground plane;

a predetermined dimension conductive plate predeterminedly spaced from said ground plane;

a predeterminedly tapered dielectric element positioned between the conductive plate and the ground plane;

an electrical interconnection point predeterminedly located between the conductive plate and the ground plane; and

a pair of driving point connections to the conductive plate, each driving point being at a predetermined distance r₁, r₂, respectively, from said interconnection point.

2. The microstrip antenna of claim 1 wherein the conductive plate is circular in shape and the tapered dielectric is conical in shape having the longitudinal axis thereof positioned opposite the center of the circular shape.

3. The microstrip antenna of claim 2 wherein the interconnection point extends from the center of the conductive plate, through the longitudinal axis of the dielectric cone to the ground plane.

4. The microstrip antenna of claim 3 wherein each driving point is located on the same diameter of :

said circular plate, on opposite sides of the center thereof, with the distances r₁ and r₂ selected to form tuned circuits below and above, respectively, a desired center frequency.

5. The microstrip antenna of any one of claims 1-4 in combination with a 180°

hybrid, the 180°

hybrid adapted to receive a signal from a signal source and split said signal into two, 180°

out of phase signals, each of said signals being fed to one of said driving point connections.