发明名称 |
Radio communication equipment |
摘要 |
A small radio communication unit which requires no antenna adjustment is provided by using small chip antennas whose gain is not degraded and which have a wide bandwidth. The inventive radio communication unit comprises a first chip antenna contained within the unit and having a first frequency characteristic; a first filter connected to the first antenna and having a pass bandwidth for passing a received signal; a receiving circuit connected to an output end of the first antenna; a receiving PLL circuit for outputting a local oscillation signal; a second chip antenna contained within the unit and having a second frequency characteristic; a second filter connected to the second antenna and having a pass bandwidth for passing a transmitted signal; a transmitting circuit connected to an input end of the second filter and comprising a transmitting carrier oscillation and modulating circuit, a transmission amplifier circuit and an isolator; a control circuit for controlling operations of the receiving circuit and the transmitting circuit; and a modulating signal input terminal to which a modulating signal is applied.
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申请公布号 |
US5797084(A) |
申请公布日期 |
1998.08.18 |
申请号 |
US19960664139 |
申请日期 |
1996.06.14 |
申请人 |
MURATA MANUFACTURING CO. LTD |
发明人 |
TSURU, TERUHISA;MANDAI, HARUFUMI;SHIROKI, KOJI;ASAKURA, KENJI |
分类号 |
H01Q1/24;H01Q1/36;H01Q1/38;H04B1/38;H04B1/50;(IPC1-7):H04B1/38;H01Q9/00 |
主分类号 |
H01Q1/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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