Electrically-small low Q radiator structure and method of producing EM waves therewith
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01Q-021/00
H01Q-009/16
출원번호
US-0614950
(2000-07-12)
발명자
/ 주소
Craig A. Grimes
Dale M. Grimes
Faton Tefiku
Gang Lui
출원인 / 주소
University of Kentucky Research Foundation
대리인 / 주소
Macheledt Bates LLP
인용정보
피인용 횟수 :
27인용 특허 :
7
초록▼
An electrically small radiator structure for radiating electromagnetic waves having an electrical size, k*a, with a value less than .pi./2 and above .pi./20,000 and configured to have at least a first and second magnetic, or electric, dipole element. Dipole elements are preferably oriented such that
An electrically small radiator structure for radiating electromagnetic waves having an electrical size, k*a, with a value less than .pi./2 and above .pi./20,000 and configured to have at least a first and second magnetic, or electric, dipole element. Dipole elements are preferably oriented such that a source-associated standing energy value for the structure, or Wds(tR), is low, Radiative Q value preferably less than 1/3(k*a)3; and each of the elements, whether paired with respective electric dipole elements, is in electrical communication through a feed circuit to at least one power source. Further, a first dipole pair (or element) oriented orthogonally with respect to a second pair (or element) are in voltage phase-quadrature; the structure is operational at a frequency below 5 GHz; and dipole moments oriented such that the following is generally satisfied: a divergence of the Poynting vector of the pairs with respect to retarded time, namely ▽`tR?N, has a value less than 1.0. Also, a method of producing electromagnetic waves using an electrically small radiator structure, including configuring the structure to have at least a first and second pair of dipole moments and an electrical size, k*a, with a value less than .pi./2 and above .pi./20,000; and powering a first feed area of the first pair and a second feed area of the second pair with at least one source operating at a frequency to radiate the waves.
대표청구항▼
1. An electrically small radiator structure for radiating electromagnetic waves, comprising:the structure having an electrical size, k*a, with a value between .pi./20,000 and .pi./2 and configured to have at least a first and second magnetic dipole element, wherein said electrical size, k*a, represe
1. An electrically small radiator structure for radiating electromagnetic waves, comprising:the structure having an electrical size, k*a, with a value between .pi./20,000 and .pi./2 and configured to have at least a first and second magnetic dipole element, wherein said electrical size, k*a, represents the expression 2.pi.?(a/.lambda.), where .lambda. represents the wavelength of the radiating electromagnetic waves and a represents a radius of a circumscribing sphere around the radiator structure.
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이 특허에 인용된 특허 (7)
Gunton David J. (Stakeford GBX), Antenna assembly for microwave reflection survey equipment.
Kang, Jiwon; Chung, Sae-Young; Ko, Hyunsoo; Chung, Jaehoon, Method and apparatus for beamforming using polarized antenna in a wireless communication system.
Cezanne, Juergen; Tavildar, Saurabha R.; Anreddy, Bikram Reddy; Wu, Xinzhou; Laroia, Rajiv, Methods and apparatus for supporting communications using a first polarization direction electrical antenna and a second polarization direction magnetic antenna.
Cezanne, Juergen; Tavildar, Saurabh; Anreddy, Vikram Reddy; Wu, Xinzhou; Laroia, Rajiv, Methods and apparatus for supporting communications using antennas associated with different polarization directions.
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