| 摘要 |
PURPOSE:To obtain a microstrip antenna where the adjustment of a resonance frequency is easy. CONSTITUTION:This microstrip antenna is the one where an antenna conductor 2 and an earth conductor 3 are formed at the front and the back surfaces of a printed board 1 and the antenna is made an uneven cross-sectional shape where a recessed part 203 and a projected part 204 are alternately continuous at the electric field direction end sides 201 and 202 of the antenna conductor 2. The projected part 204 is cut off from the antenna conductor 2 or the recessed part 203 is buried by soldering 5. Thus, a resonance frequency is adjusted by the buried number. Therefore, because the resonance frequency is determined by the cut-off number of the projected part 204 or the buried number of the soldering 5 to the recessed part 203, the adjustment is easy, and when many antennas are ad-justed, the adjustment dispersion is reduced. The both of the adjustment in the direction increasing the resonance frequency and the adjustment in the direction lowering the resonance frequency are possible. |
