| 摘要 |
PROBLEM TO BE SOLVED: To reduce costs by separating a high-frequency transmission channel from a radiation antenna and by respectively improving the versatility of insertion holes, high-frequency transmission channels, and antenna structures to increase the amount of high-frequency radiation energy while preventing an antenna conductor from melting.SOLUTION: An antenna structure to radiate high frequency into the combustion chamber of an internal combustion engine includes: an end cap part that blocks the inside opening of a through-hole provided in an internal combustion engine for guiding high frequency into the combustion chamber of the internal combustion engine; a radiation antenna provided at the end cap part to radiate electromagnetic waves into the combustion chamber of the internal combustion engine; and a power feeding part which connects the radiation antenna with a high-frequency transmission channel provided inside the through-hole to supply the high frequency from the high-frequency transmission channel to the radiation antenna. The high-frequency transmission channel is detachably provided on the power feeding part to enable transmission of the high frequency. |
