PHASE AND AMPLITUDE DETECTION CIRCUIT, TRANSMISSION MODULE AND ARRAY ANTENNA

WIPO Patent Application WO/2018/109871

A1

Provided is a phase and amplitude detection circuit comprising: switches 1, 5 that, using transmission lines 2,3, operate to sequentially switch among three states, namely a first state in which the phase of a reference signal is varied by 0° and then output, a second state in which the phase of the reference signal is varied by 90° and then output, and a third state in which passage of the reference signal is blocked; a mixer 7 that mixes the reference signal and a signal to be measured if in the first or second state, and detects the amplitude of the signal to be measured if in the third state; an LPF 8 that extracts the direct current component from a signal output from the mixer 7; an A/D converter 9 that converts the voltage value of the direct current component output from the LPF 8 to a digital signal; and a signal processing circuit 10 that, in the case of the first state and the second state, calculates the phase difference between the reference signal and the signal to be measured on the basis of two digital signals output respectively from the A/D converter 9, and that, in the case of the third state, calculates the amplitude of the signal to be measured on the basis of the digital signal output from the A/D converter 9.

MIZUTANI HIROYUKI (JP)
NOTO HIFUMI (JP)
NAKAMIZO HIDEYUKI (JP)
TAJIMA KENICHI (JP)

PCT/JP2016/087240

June 21, 2018

December 14, 2016

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MITSUBISHI ELECTRIC CORP (JP)

H03D5/00; H01Q3/26; H01Q21/06; H01Q23/00

WO2011108397A1

2011-09-09

JP2013201556A	2013-10-03
JPS63118580U	1988-08-01
JPH08186447A	1996-07-16

SOGA, Michiharu et al. (JP)

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