MILLIMETER WAVEBAND TRANSCEIVER, RADAR AND VEHICLE USING THE SAME
First Claim
1. A millimeter waveband transceiver comprising:
- a microstrip line;
a standard waveguide; and
a transmission mode transducer provided therebetween,wherein the transmission mode transducer comprising a waveguide transducer, andwherein the characteristic impedance of the waveguide transducer is equal to or less than the characteristic impedance of the microstrip line.
3 Assignments
0 Petitions
Accused Products
Abstract
In a millimeter waveband transceiver using an antenna and a waveguide for a connection line, it is necessary to perform transmission mode line conversion between TEM waves of a microstrip line and VTE01 mode waves of the waveguide. There is a limit to reducing the conversion loss using only a matching box for connecting the microstrip line with the waveguide. In a transmission mode line transducer for converting between the TEM waves of the microstrip line and the VTE01 mode waves of the waveguide, if the cross-sections are substantially the same size, in the case of a 50Ω microstrip line when the characteristic impedance of the waveguide is about 80%, i.e., 40Ω, the line conversion loss can be optimized. Therefore, the microstrip line is connected with the waveguide using a λ/4 matching box via a ridged waveguide having a low impedance and a length of λ/16 or less.
91 Citations
20 Claims
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1. A millimeter waveband transceiver comprising:
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a microstrip line; a standard waveguide; and a transmission mode transducer provided therebetween, wherein the transmission mode transducer comprising a waveguide transducer, and wherein the characteristic impedance of the waveguide transducer is equal to or less than the characteristic impedance of the microstrip line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A vehicle radar, comprising a millimeter waveband transceiver with a radar function comprising:
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an RF circuit; a plurality of antennas; a standard waveguide which constitutes the input and output terminals of the antennas; and a transmission mode transducer connected respectively between the RF circuit and standard waveguides, wherein the transmission mode transducer is an vertical transducer that connects the microstrip line of the RF circuit with the ridged waveguide at right angles, and wherein the characteristic impedance of the ridged waveguide is equal to or less than the characteristic impedance of the microstrip line. - View Dependent Claims (16, 17)
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18. A vehicle comprising:
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a millimeter waveband transceiver mounted on the vehicle, the vehicle having a radar function; and an electronic circuit that controls the vehicle based on information from the millimeter waveband transceiver, wherein the millimeter waveband transceiver comprising an RF circuit, a plurality of antennas, a standard waveguide which constitutes the input and output terminals of the plurality of antennas, and a transmission mode transducer connected respectively between the RF circuit and standard waveguides, wherein the transmission mode transducer is an vertical transducer that connects the microstrip line of the RF circuit with a ridged waveguide at right angles, and wherein the characteristic impedance of the ridged waveguide is equal to or less than the characteristic impedance of the microstrip line. - View Dependent Claims (19, 20)
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Specification