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DC isolated phase inverter and a ring hybrid coupler including the DC isolated phase inverter

A hybrid coupler and inverter technology, applied in the field of communication systems

Inactive Publication Date: 2006-09-20
GLOBALFOUNDRIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Although when using a common-mode biased differential amplifier that uses "ring waveguides" at its input and output as baluns, it is difficult to Favorable, but conventional inverter construction precludes this advantage due to the need to use blocking capacitors and supply resistors

Method used

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  • DC isolated phase inverter and a ring hybrid coupler including the DC isolated phase inverter
  • DC isolated phase inverter and a ring hybrid coupler including the DC isolated phase inverter
  • DC isolated phase inverter and a ring hybrid coupler including the DC isolated phase inverter

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Embodiment Construction

[0037] FIG. 2B illustrates a direct current (DC) isolated inverter 210 including a finite grounded coplanar waveguide (FGCPW) transmission line 250 according to an exemplary embodiment of the present invention. As shown in FIG. 2B, DC isolated inverter 210 includes ground traces 220a-d that are interchanged with input signal trace 230a and inverter signal trace 230b. The DC isolating inverter 210 also includes capacitors 240a-d inserted in series in the ground traces 220a-d. The DC isolation inverter 210 can use coplanar waveguide, coplanar stripline, microstrip and slotline transmission lines instead of the FGCPW transmission line 250, all of which are capable of millimeter wave and microwave transmission.

[0038] FIG. 3 is a layout of the DC isolated inverter 210 . Although the DC-isolated inverter 210 of FIG. 2 includes four capacitors 240a-d, only two capacitors 240a, 240d are shown in FIG. 3 for illustration purposes. As shown in Figure 3, using a 2 The capacitance de...

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Abstract

A direct current (DC) isolated phase inverter and a ring hybrid coupler including the DC isolated phase inverter is provided. The ring hybrid coupler including the DC isolated phase inverter comprising: a first, second, third and fourth transmission line arm; a first port connected to the first arm, second port connected to the second arm, third port connected to the third arm and fourth port connected to the fourth arm; and a DC phase inverter inserted within one of the first, second, third and fourth arms, wherein the DC phase inverter comprises: a transmission line comprising a plurality of signal and ground traces, wherein the plurality of signal and ground traces are interchanged; and a plurality of capacitors disposed in series with the ground traces, wherein the plurality of capacitors isolate the DC phase inverter from a device connected to the transmission line.

Description

technical field [0001] The present invention relates to communication systems, and more particularly to millimeter wave transmission lines and hybrid couplers. Background technique [0002] One traditional building block used in high frequency circuits, such as radio frequency (RF) or millimeter wave circuits, is the ring hybrid or "rat-race" coupler. Ring hybrid or "ring waveguide" couplers are four-port devices used as power combiners or splitters in a variety of applications such as balanced amplification and mixing, differential clock or local oscillator signal generation, and power combining. A conventional four-port annular hybrid coupler 110 with a microstrip transmission line is shown in FIG. 1A. [0003] As shown in FIG. 1A , the circumference of the ring hybrid coupler 110 is 6λ / 4, where λ is the wavelength that defines the center frequency of operation of the ring hybrid coupler 110 . Typically, the ring hybrid coupler 110 is designed to have an equal eg 3dB pow...

Claims

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Application Information

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IPC IPC(8): H01P5/22
CPCH01P5/222H01P5/185
Inventor B·A·弗洛伊德T·兹维克M·K·奇瑞拉
Owner GLOBALFOUNDRIES INC
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