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US 4,896,162 AGranted
Capacitance loaded monopole antenna
AssigneeHughes Aircraft Company
InventorO. D. Parham
Life of this patent
Estimating the term…
Abstract
An antenna employing a first capacitor formed by a conductive segment disposed above a ground plane and serially connected adjacent capacitors formed over the ground plane. The adjacent capacitors are connected to the ground plane by tuned circuits, resulting in additive coupling of the E fields across the first and adjacent capacitors and the prevention of E field shunting.
Claims26
An antenna for receiving an electromagnetic signal, comprising:
- means for providing a reference plate;
- means for providing a plurality of capacitor plates disposed with respect to said means for providing a reference plate to form a plurality of capacitors for receiving said electromagnetic signal, and thereby developing an E field across each of said capacitors;
- wherein:
- a first capacitor of said plurality of capacitors is formed by said means for providing a reference plate and a first capacitor plate of said means for providing a plurality of capacitor plates;
- a second capacitor of said plurality of capacitors is formed by a second capacitor plate of said means for providing a plurality of capacitor plates disposed above said means for providing a reference plate and disposed laterally from and not overlying said first capacitor plate;
- a third capacitor of said plurality of capacitors is formed by a third capacitor plate of said means for providing a plurality of capacitor plates disposed above said second capacitor plate and disposed laterally from and not overlying said first capacitor plate;
- and
- means for serially coupling selected ones of said plurality of capacitors together such that the E fields of said plurality of capacitors are additively coupled, said means comprising a serial connection between said first capacitor plate and said second capacitor plate, and inductive means coupled between said second capacitor plate and said means for providing a reference plate.
5 more elements
An antenna comprising:
- a ground plane means;
- a first upper capacitor plate means spaced apart from said ground plane means;
- a second upper capacitor plate means spaced apart from said ground plane means;
- a first intermediate capacitor plate means positioned between said second capacitor plate means and said ground plane means;
- a third upper capacitor plate means;
- a second intermediate capacitor plate means positioned between said third upper plate means and said ground plane means;
- first conductor means for connecting said first upper plate means to said first intermediate plate means;
- second conductor means for connecting said second upper plate means to said second intermediate plate means;
- a first inductor means connected between said first intermediate plate means and said ground plane means;
- and
- a second inductor means connected between said intermediate plate means and said ground plane means.
8 more elements
An antenna for receiving an electromagnetic signal, comprising:
- a reference plane;
- a first upper capacitor plate spaced apart from said reference plane by a first distance;
- a second upper capacitor plate spaced apart from said reference plane by a second distance;
- a first intermediate capacitor plate positioned between said second capacitor plate and said reference plane;
- a third upper capacitor plate spaced apart from said reference plane by a third distance;
- a second intermediate capacitor plate positioned between said third upper plate and said reference plane;
- means for electrically connecting said first upper plate to said first intermediate plate;
- means for electrically connecting said second upper plate to said second intermediate plate;
- a first inductor connected between said first intermediate plate and said reference plane;
- and
- a second inductor connected between said second intermediate plate and said reference plane.
8 more elements
An antenna for receiving an electromagnetic signal, comprising:
- means for providing a reference plate;
- means for providing a plurality of capacitor plates disposed with respect to said means for providing a reference plate to form a plurality of capacitors for receiving said electromagnetic signal, and thereby developing an E field across each of said capacitors;
- wherein:
- a first capacitor of said plurality of capacitors is formed by said means for providing a reference plate and a first capacitor plate of said means for providing a plurality of capacitor plates;
- a second capacitor of said plurality of capacitors is formed by a second capacitor plate of said means for providing a plurality of capacitor plates disposed above said means for providing a reference plate;
- a third capacitor of said plurality of capacitors is formed by a third capacitor plate of said means for providing a plurality of capacitor plates disposed above said second capacitor plate;
- a fourth capacitor of said plurality of capacitors is formed by a fourth capacitor plate of said means for providing a plurality of capacitor plates disposed above said means for providing a reference plate;
- and
- a fifth capacitor of said plurality of capacitors is formed by a fifth capacitor plate of said means for providing a plurality of capacitor plates disposed above said fourth capacitor plate;
- means for serially coupling selected ones of said plurality of capacitors together such that the E fields of said plurality of capacitors are additively coupled, said means comprising a serial connection between said first capacitor plate and said second capacitor plate, and inductive means coupled between said second capacitor plate and said means for providing a reference plate, and a serial connection between said third capacitor plate and said fifth capacitor plate, and inductive means coupled between said fourth capacitor plate and said means for providing a reference plate.
7 more elements
Dependencies are inferred from the claim text.