| US 7,546,104 B2 | ||
| Receiving apparatus and receiving circuit | ||
| Yoshihito Kitayama, Akishima (Japan); and Kunio Okada, Iruma (Japan) | ||
| Assigned to Casio Computer Co., Ltd., Tokyo (Japan) | ||
| Filed on Dec. 01, 2005, as Appl. No. 11/293,474. | ||
| Claims priority of application No. 2004-349968 (JP), filed on Dec. 02, 2004; and application No. 2005-217482 (JP), filed on Jul. 27, 2005. | ||
| Prior Publication US 2006/0166635 A1, Jul. 27, 2006 | ||
| Int. Cl. H04B 1/06 (2006.01) | ||
| U.S. Cl. 455—277.2 [455/277.1; 455/134; 455/135; 370/334; 370/336] | 24 Claims |
| 1. A receiving apparatus comprising:
a receiving antenna;
a characteristic change unit for changing a reception characteristic of the receiving antenna;
a reception quality detection unit for detecting a reception quality of a received signal received by the receiving antenna;
and
an antenna control unit for controlling the characteristic change unit to change the reception characteristic of the receiving
antenna based on a detection result by the reception quality detection unit,
wherein the antenna control unit includes:
a comparison unit for comparing a value of a present reception quality detected by the reception quality detection unit with
a value of a reception quality detected at a last time, and
a change control unit for controlling the characteristic change unit to change the reception characteristic of the receiving
antenna when it is judged that the value of the present reception quality has become worse than the value of the reception
quality detected at the last time with the comparison unit, and
wherein the characteristic change unit includes an auxiliary antenna arranged in a neighborhood of the receiving antenna,
the auxiliary antenna changing the reception characteristic of the receiving antenna by receiving application of a voltage
based on the control of the antenna control unit.
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