Onboard radar device and program of controlling onboard radar device

An onboard radar apparatus comprising:

• a transmission wave generating unit configured to generate a transmission wave;
• a vertically polarized wave transmitting antenna configured to vertically polarize and transmit the transmission wave;
• a horizontally polarized wave transmitting antenna configured to horizontally polarize and transmit the transmission wave;
• a receiving antenna configured to receive a reflection wave reflected from an object;
• a switch control unit configured to perform a switching between the vertically polarized wave transmitting antenna and the horizontally polarized wave transmitting antenna, the switch control unit controlling a supply of the transmission wave, which has been generated by the transmission wave generating unit, to the switched one of the vertically polarized wave transmitting antenna and the horizontally polarized wave transmitting antenna, so as to alternately transmit the transmission wave that is vertically polarized and the transmission wave that is horizontally polarized;
• and
• a receiving unit configured to receive one of the reflection wave corresponding to the transmission wave that is vertically polarized and the reflection wave corresponding to the transmission wave that is horizontally polarized as a reception signal, based on receiving levels of the reflection waves, which have been received by the receiving antenna before and after the switching is performed by the switch control unit,
• when it is not detected that the reflection wave is received by the receiving antenna, the switch control unit performs the switching between the vertically polarized wave transmitting antenna and the horizontally polarized wave transmitting antenna, and
• the receiving unit receives the reflection wave, which has been received by the receiving antenna after the switching performed by the switch control unit, as the reception signal.

An onboard radar apparatus comprising:

• a transmission wave generating unit configured to generate a transmission wave;
• a transmitting antenna configured to polarize and transmit the transmission wave;
• a vertically polarized wave receiving antenna configured to receive a vertically polarized reflection wave reflected from an object;
• a horizontally polarized wave receiving antenna configured to receive a horizontally polarized reflection wave reflected from the object;
• a switch control unit configured to perform a switching between the vertically polarized wave receiving antenna and the horizontally polarized wave receiving antenna so as to alternately receive the vertically polarized reflection wave reflected from the object and the horizontally polarized reflection wave reflected from the object;
• a receiving unit configured to receive one of the vertically polarized reflection wave, which has been received by the vertically polarized wave receiving antenna, and the horizontally polarized reflection wave, which has been received by the horizontally polarized wave receiving antenna, as a reception signal, before and after the switching performed by the switch control unit, based on a receiving level of one of the vertically polarized reflection wave, which has been received by the vertically polarized wave receiving antenna, and the horizontally polarized reflection wave, which has been received by the horizontally polarized wave receiving antenna;
• and
• a storage unit configured to store the reception signal, which has been received by the receiving unit, every time the switching between the vertically polarized wave receiving antenna and the horizontally polarized wave receiving antenna is performed, and
• wherein the receiving unit compares the reception signal stored in the storage unit with the reception signal, which has been received by one of the vertically polarized wave receiving antenna and the horizontally polarized wave receiving antenna after the switching between the vertically polarized wave receiving antenna and the horizontally polarized wave receiving antenna is performed by the switch control unit, so as to receive the reception signal with a high receiving level.

An onboard radar apparatus comprising:

• a transmission wave generating unit configured to generate a transmission wave;
• a transmitting antenna configured to polarize and transmit the transmission wave;
• a vertically polarized wave receiving antenna configured to receive a vertically polarized reflection wave reflected from an object;
• a horizontally polarized wave receiving antenna configured to receive a horizontally polarized reflection wave reflected from the object;
• a switch control unit configured to perform a switching between the vertically polarized wave receiving antenna and the horizontally polarized wave receiving antenna so as to alternately receive the vertically polarized reflection wave reflected from the object and the horizontally polarized reflection wave reflected from the object;
• and
• a receiving unit configured to receive one of the vertically polarized reflection wave, which has been received by the vertically polarized wave receiving antenna, and the horizontally polarized reflection wave, which has been received by the horizontally polarized wave receiving antenna, as a reception signal, before and after the switching performed by the switch control unit, based on a receiving level of one of the vertically polarized reflection wave, which has been received by the vertically polarized wave receiving antenna, and the horizontally polarized reflection wave, which has been received by the horizontally polarized wave receiving antenna, wherein
• when it is not detected that the reflection wave is received by at least one of the vertically polarized wave receiving antenna and the horizontally polarized wave receiving antenna, the switch control unit performs the switching between the vertically polarized wave receiving antenna and the horizontally polarized wave receiving antenna, and
• the receiving unit receives one of the vertically polarized reflection wave, which has been received by the vertically polarized wave receiving antenna, and the horizontally polarized reflection wave, which has been received by the horizontally polarized wave receiving antenna, as the reception signal after the switching is performed by the switch control unit.