Millimeter waveband transceiver, radar and vehicle using the same

A vehicle radar, comprising a millimeter waveband transceiver with a radar function comprising:

• 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.

A vehicle comprising:

• 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.