| 摘要 |
In a microstrip type antenna used in a radio transceiver, the microstrip type antenna comprises a push-button switch which has a locked state of a first height and an unlocked state of a second height higher than the first height. The locked state and the unlocked state are changed alternately each time when the push-button switch is pushed down. A dielectric plate is connected to the push-button switch to be moved by the push-button switch and has first and second surfaces which are parallel to each other. A plane antenna element has a principal part in parallel to the dielectric plate and a supporting part which is connected to the first surface and which is contiguous to the principal part to support the principal part. A ground plate is located in parallel to the dielectric plate with a space interval which left between the second surface and the ground plate and which is variable in response to operation of the push-button switch. <IMAGE> <IMAGE> |
