| 摘要 |
PURPOSE: To provide a compact portable radio equipment having high receiving sensitivity by controlling resonance frequency in accordance with frequency to be received. CONSTITUTION: In the portable radio equipment provided with at least a receiving antenna 101, a receiving filter 102 and a control part 106, either one or both of the antenna 101 and the filter 102 is provided with a resonance frequency variable means. A mobile communication system between mutually separated bands can be attained by changing the resonance frequency of either one or both of the antenna 101 and the filter 102 by the variable means. |
