US 4,509,053 A · Blade antenna with shaped dielectric

Abstract

A Tee slot blade antenna for aircraft and other high speed vehicles has a pair of dielectric sections, one section extending longitudinally along the blade and the other extending transversely from an intermediate location along the longitudinal section. The resonant frequency of the antenna is determined by the length of each section and the position of the transverse section along the longitudinal one, while the characteristic impedance is a function of the width of each section. The Tee slot antenna is capable of operating over a wide bandwidth on a smaller blade than prior single slot antennas. A Tee slot antenna designed for one frequency range can be combined with either a single slot antenna or another Tee slot antenna designed for another frequency range on the same antenna blade, without impairing the bandwidth of either antenna.

Claims17

Dependent claims

An antenna having a predetermined resonant frequency for high speed craft, comprising:

a blade-like member having a base portion, a leading edge and a trailing edge,
a dielectric material disposed within the blade-like member in a radiating slot, a first section of said dielectric material extending generally longitudinally along the member, and a second section of said material extending generally transversely to the first section from an intermediate location thereon which is spaced inwardly from the ends of the first section, the location of the second section relative to the first section being selected to establish said predetermined resonant frequency, and
means for feeding a radiating signal to said dielectric material.

Dependencies are inferred from the claim text.

Blade antenna with shaped dielectric

Life of this patent

Blade antenna with shaped dielectric

Life of this patent

Abstract

Claims17