Multi-Band Antenna Assemblies
AssigneeLaird Technologies, Inc.
InventorsImad M. Swais, Rafael Haro
Life of this patent
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Abstract
A multi-band antenna assembly that is operable to receive and/or transmit signals at one or more frequencies generally includes at least two radiating elements, a transmission line coupled to each of the at least two radiating elements, and a tunable match resonator coupled to the transmission line. The tunable match resonator is operable to vary input impedance of a signal received and/or transmitted by the antenna assembly by changing an electrical field within the tunable match resonator.
Claims25
A multi-band antenna assembly operable to receive and/or transmit signals at one or more frequencies, the antenna assembly comprising:
- at least two radiating elements;
- a transmission line coupled to each of the at least two radiating elements;
- and
- a tunable match resonator coupled to the transmission line and operable to vary input impedance of a signal received and/or transmitted by the antenna assembly by changing an electrical field within the tunable match resonator.
A tunable match resonator for an antenna assembly, the tunable match resonator comprising:
- a generally tubular radiating element;
- a loading rod disposed at least partially within the radiating element;
- a balun coupled to the loading rod;
- and
- a dielectric load bushing coupled to the balun;
- wherein the balun and the dielectric load bushing are disposed at least partially within the radiating element, the balun and the dielectric load bushing being moveable relative to the loading rod for varying input impedance of a signal received and/or transmitted by an antenna assembly by changing an electrical field within the tunable match resonator;
- whereby the tunable match resonator is operable to adjust the frequency bandwidth of signals capable of being received and/or transmitted by an antenna assembly.
A multi-band array antenna assembly operable to receive and/or transmit signals at one or more frequencies, the array antenna assembly comprising:
- first, second, and third open-ended radiating tubes oriented in a generally stacked configuration;
- a coaxial cable extending generally through each of the first and second radiating tubes;
- a loading rod coupled to the coaxial cable and extending generally through the third radiating tube;
- a balun coupled to the loading rod generally within the third radiating tube and moveable longitudinally relative to the loading rod within the third radiating tube;
- and
- a dielectric load bushing coupled to the balun;
- wherein the balun and the dielectric load bushing are operable to vary input impedance of a signal received and/or transmitted by the array antenna assembly by changing an electrical field within the third radiating tube to thereby adjust the frequency bandwidth of signals capable of being received and/or transmitted by the array antenna assembly.
A method comprising providing a multi-band antenna assembly suitable for use with a base station subsystem, wherein the multi-band antenna assembly includes at least two radiating elements, a transmission line coupled to each of the at least two radiating elements, and a tunable match resonator coupled to the transmission line and operable to vary input impedance of at least one or more signals received and/or transmitted by the multi-band antenna assembly by changing an electrical field within the tunable match resonator.
Dependencies are inferred from the claim text.