Phased-array antenna filter and diplexer for a super economical broadcast system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01P-003/12
H01P-005/12
출원번호
US-0427674
(2009-04-21)
등록번호
US-8344826
(2013-01-01)
발명자
/ 주소
Rossiter, Chris
Dunning, Robert
Johnson, Torbjorn
출원인 / 주소
SPX Corporation
대리인 / 주소
Baker & Hostetler LLP
인용정보
피인용 횟수 :
1인용 특허 :
7
초록▼
A phased-array antenna filter and diplexer for a super economical broadcast system are provided. The filter and diplexer includes a signal divider tee diplexer, a receive filter and a transmit filter. The diplexer includes a tee branch point, an antenna port, a transmit port and a receive port. The
A phased-array antenna filter and diplexer for a super economical broadcast system are provided. The filter and diplexer includes a signal divider tee diplexer, a receive filter and a transmit filter. The diplexer includes a tee branch point, an antenna port, a transmit port and a receive port. The receive filter includes a flat, multi-pole bandpass filter, an input port and an output port, where the input port is coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, that has a length of approximately one quarter receive wavelength. The transmit filter includes a folded, multi-pole bandpass filter, an input port and an output port, where the output port is coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, that has a length of approximately one quarter transmit wavelength.
대표청구항▼
1. A phased-array antenna filter and diplexer for a cellular communication system, comprising: a signal divider tee diplexer including a tee branch point, an antenna port, a diplexer transmit port and a diplexer receive port;a receive filter including a maximally-flat, multi-pole bandpass filter, a
1. A phased-array antenna filter and diplexer for a cellular communication system, comprising: a signal divider tee diplexer including a tee branch point, an antenna port, a diplexer transmit port and a diplexer receive port;a receive filter including a maximally-flat, multi-pole bandpass filter, a receive input port and a receive output port, the receive input port coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, having a length of approximately one quarter receive wavelength; anda transmit filter including a folded, multi-pole bandpass filter, a transmit input port and a transmit output port, the transmit output port coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, having a length of approximately one quarter transmit wavelength,wherein the antenna port transfers signal energy bidirectionally with at least one radiator stack of an antenna. 2. The phased-array antenna filter and diplexer of claim 1, wherein the diplexer antenna port transfers signal energy bidirectionally with two of four radiator stacks of an antenna. 3. The phased-array antenna filter and diplexer of claim 1, wherein the diplexer includes a common leg, a transmit leg, and a receive leg. 4. The phased-array antenna filter and diplexer of claim 3, wherein the transmit leg of the diplexer appears as an open circuit to signals at a frequency range of the receive leg. 5. The phased-array antenna filter and diplexer of claim 3, wherein the receive leg of the diplexer appears as an open circuit to signals at a frequency range of the transmit leg. 6. A phased-array antenna filter and diplexer for a cellular communication system, comprising: a signal divider tee diplexer including a tee branch point, an antenna port, a diplexer transmit port and a diplexer receive port;a receive filter including a maximally-flat, multi-pole bandpass filter, a receive input port and a receive output port, the receive input port coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, having a length of approximately one quarter receive wavelength;a transmit filter including a folded, multi-pole bandpass filter, a transmit input port and a transmit output port, the transmit output port coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, having a length of approximately one quarter transmit wavelength; anda unitized envelope enclosing the diplexer, the transmit filter and the receive filter. 7. The phased-array antenna filter and diplexer of claim 6, wherein the unitized envelope is a unitary machined or cast block of a free-machining or castable/machineable aluminum alloy. 8. The phased-array antenna filter and diplexer of claim 7, further comprising resonator elements that are oriented in parallel positions, compatible with milling a respective chambers of the unitized envelope from one side. 9. A phased-array antenna filter and diplexer for a cellular communication system, comprising: a signal divider tee diplexer including a tee branch point, an antenna port, a diplexer transmit port and a diplexer receive port;a receive filter including a maximally-flat, multi-pole bandpass filter, a receive input port and a receive output port, the receive input port coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, having a length of approximately one quarter receive wavelength; anda transmit filter including a folded, multi-pole bandpass filter, a transmit input port and a transmit output port, the transmit output port coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, having a length of approximately one quarter transmit wavelength,wherein the receive filter is a maximally-flat 7-pole bandpass filter and includes cascaded, serpentine-arranged, and resonator-loaded tuned cavities, with bandwidth-determining tuning screws disposed in coupling windows between the cavities. 10. The phased-array antenna filter and diplexer of claim 9, wherein the receive filter includes at least one transmission zero realized through inductive cross-coupling from a predetermined number of additional windows. 11. The phased-array antenna filter and diplexer of claim 9, wherein the receive filter is tunable to lower out-of-band rejection. 12. A phased-array antenna filter and diplexer for a cellular communication system, comprising: a signal divider tee diplexer including a tee branch point, an antenna port, a diplexer transmit port and a diplexer receive port;a receive filter including a maximally-flat, multi-pole bandpass filter, a receive input port and a receive output port, the receive input port coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, having a length of approximately one quarter receive wavelength;a transmit filter including a folded, multi-pole bandpass filter, a transmit input port and a transmit output port, the transmit output port coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, having a length of approximately one quarter transmit wavelength; andthe receive filter further comprises: a first conductive link from a diplexer receiver-side port to a first receiver filter resonator; and a second conductive link from a last receiver filter resonator to a low-noise amplifier. 13. The phased-array antenna filter and diplexer of claim 12, wherein an increased number of poles and an increased cavity size narrows a receive reject band. 14. A phased-array antenna filter and diplexer for a cellular communication system, comprising: a signal divider tee diplexer including a tee branch point, an antenna port, a diplexer transmit port and a diplexer receive port;a receive filter including a maximally-flat, multi-pole bandpass filter, a receive input port and a receive output port, the receive input port coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, having a length of approximately one quarter receive wavelength; anda transmit filter including a folded, multi-pole bandpass filter, a transmit input port and a transmit output port, the transmit output port coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, having a length of approximately one quarter transmit wavelength,wherein the transmit filter is a folded 6-pole bandpass filter including a conductive link from a last transmitter filter resonator to a diplexer transmit-side port. 15. The phased-array antenna filter and diplexer of claim 14, wherein the folded 6 pole transmit filter includes a cross-coupled filter having two low-side transmission zeroes. 16. The phased-array antenna filter and diplexer of claim 15, wherein the transmit filter includes: complex cross-coupling with a capacitive and an inductive zero below a passband;cascaded, serpentine-arranged, and resonator-loaded tuned cavities within the passband; andtunable coupling windows.
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