Frequency-selective dipole antennas

摘要

A dipole antenna provides electrical dipole conductors folded to form distributed inductive and/or capacitive reactive loads between selected portions of one or more coupled line segments of the individual dipole conductors or between one dipole conductor to another, wherein the electrical dipole conductors form a selective frequency filter. An antenna provides a substrate, electrical conductors formed on and/or in the substrate, and one or more ceramic dielectric elements having relative permittivity ∈R≧10 and/or relative permeability μR≧10 formed on and/or in the substrate between selected portions of the electrical conductors for determining a distributed reactance within the selected portions. A folded dipole antenna provides conducting dipole arms, a distributed network filter having distributed reactance within and between the conducting dipole arms, and a tunable reactance connected to an input of the distributed network filter for adjusting a resonant frequency of the antenna.

主权项

1. A dipole antenna, comprising:
a selective frequency filter formed on and/or in a substrate by electrical dipole conductors folded to have distributed inductive and capacitive reactive loads between selected portions of one or more coupled line segments of the individual dipole conductors or between one dipole conductor to another, and one or more ceramic dielectric elements having precise dielectric permittivity and/or permeability formed on and/or in the substrate and located in proximity to the coupled line segments for determining an enhanced distributed reactance in the inductive and/or capacitive reactive loads.