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 between the microstrip line and the standard waveguide,wherein the transmission mode transducer comprises a waveguide transducer,wherein the waveguide transducer is a ridged waveguide, andwherein a characteristic impedance of the ridged waveguide is equal to or less than a characteristic impedance of the microstrip line.
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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.
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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 between the microstrip line and the standard waveguide, wherein the transmission mode transducer comprises a waveguide transducer, wherein the waveguide transducer is a ridged waveguide, and wherein a characteristic impedance of the ridged waveguide is equal to or less than a 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 respective 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 a vertical transducer that connects a microstrip line of the RF circuit to a ridged waveguide thereof at a right angle, and wherein a characteristic impedance of the ridged waveguide is equal to or less than a 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 comprises an RF circuit, a plurality of antennas, a standard waveguide which constitutes 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 a vertical transducer that connects the microstrip line of the RF circuit to a ridged waveguide at a right angle, and wherein a characteristic impedance of the ridged waveguide is equal to or less than a characteristic impedance of the microstrip line. - View Dependent Claims (19, 20)
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Specification