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Planar structure microwave signal multi-distributor

外国特許コード F120006448
整理番号 PG06E18US
掲載日 2012年4月23日
出願国 アメリカ合衆国
出願番号 51535107
公報番号 20100079219
公報番号 8373521
出願日 平成19年11月19日(2007.11.19)
公報発行日 平成22年4月1日(2010.4.1)
公報発行日 平成25年2月12日(2013.2.12)
国際出願番号 JP2007072382
国際公開番号 WO2008062754
国際出願日 平成19年11月19日(2007.11.19)
国際公開日 平成20年5月29日(2008.5.29)
優先権データ
  • 特願2006-313003 (2006.11.20) JP
  • 2007JP072382 (2007.11.19) WO
発明の名称 (英語) Planar structure microwave signal multi-distributor
発明の概要(英語) In a conventional Bagley polygon power divider of a planar configuration, a length of transmission lines from an input port to output ports adjacent thereto on both sides is determined to be a quarter wavelength and a geometry thereof is an odd regular polygon with each side being a length equal to half of a wavelength at a designed frequency, which is large in size.
Since the output ports are located at vertices of the regular polygon, inconvenience can be caused, e.g., in arrangement of the output ports.
The present invention is directed to a design wherein only a characteristic impedance of a transmission line is designated for achieving matching and wherein a length of the line is allowed to be arbitrarily selected.
This permits the line length between adjacent output ports to be appropriately adjusted to a short one according to a design object, and also enables fabrication of a power divider in which output ports are aligned in a line.
従来技術、競合技術の概要(英語) BACKGROUND ART
The Wilkinson power splitter is well known as a circuit to split a microwave or millimeter-wave signal into N ways (Non-patent Document 1).
This circuit can also be used as a signal combiner and is matched with respect to any input or output port.
Furthermore, isolation is achieved among N-way output ports.
However, the circuit structure with N being three or more is stereoscopic and thus not suitable for implementation of applications to planar configurations and integrated circuits, but there are some known innovations (Patent Document 1).
In contrast to it, there are power dividers in use with only a function to divide an input signal into multi-ways.
In this case, the power dividers are also required to produce no reflection component with entry of an input signal.
Multi-way divider circuits with a transformer (Non-patent Documents 2 and 3) and Bagley polygon power dividers (Non-patent Document 4) are circuits with such function in a planar configuration.
Another known power divider is a circuit to feed power with a coaxial cable from underside of a substrate and to radially divide a signal into multi-ways on a surface of a substrate (Non-patent Document 5).
Non-patent Document 1: http://www.microwaves101.com/encyclopedia/wilkinson_nway.cfm
Non-patent Document 2: M. Kishihara, K. Yamane and I. Ohta, "Design of broadband microstrip-type multi-way power dividers," Asia-Pacific Microwave Conference, Proc., vol. 3, pp. 1688-1691, November 2003.
Non-patent Document 3: M. Kishihara, K. Yamane and I. Ohta, "DParallel processing of powell's optimization algorithm and its application to design of multi-way power dividers," Asia-Pacific Microwave Conference, Proc., 2005.
Non-patent Document 4: http://www.dc2light.pwp.blueyonder.co.uk/Webpage/Hybridcouplers.ht m#bagley
Non-patent Document 5: E. L. Holzman, "An eiginvalue equation analysis of a symmetrical coax line to N-way waveguide power divider," IEEE Trans. on MTT, Vol. 42, No 7, July 1994.
Patent Document 1: Japanese Patent Application Laid-open No. 9-289405

特許請求の範囲(英語) [claim1]
1. An odd-way power divider wherein only a characteristic impedance of a transmission line between output ports is designated and wherein a length of the transmission line is allowed to be arbitrarily selected; and wherein said output ports are connected in series.
[claim2]
2. The odd-way power divider according to claim 1, wherein a second transmission line from an input port to one of said output ports is matched at the input port and has a line length of a quarter wavelength.
[claim3]
3. An odd-way power divider wherein only a characteristic impedance of a transmission line between output ports is designated and wherein a length of the transmission line is allowed to be arbitrarily selected; wherein a second transmission line from an input port to one of said output ports is matched at the input port and has a line length of a quarter wavelength; and
wherein a geometry thereof is symmetrical when viewed from the input port.
[claim4]
4. An odd-way power divider comprising an input port and a plurality of output ports, wherein, for each of the plurality of output ports on an equivalent circuit of the odd-way power divider, a characteristic impedance of a transmission line connected to one of said plurality of output ports from a direction of the input port is equal to a combined impedance of those at one or more of said plurality of output ports at positions away from the input port with respect to the transmission line, including said one output port.
  • 発明者/出願人(英語)
  • SAKAGAMI IWATA
  • WUREN TUYA
  • UNIVERSITY OF TOYAMA
国際特許分類(IPC)
米国特許分類/主・副
  • 333/125
  • 333/26
  • 333/100
  • 333/137
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