发明名称 |
High sensitivity radio receiver |
摘要 |
A receiver directs the center of the main beam of the antenna directivity response in a desired direction by passing signals received by n antenna elements 1a to 1d through a phase shifter 3. An output from the phase shifter 3 is passed through a receiving filter 5 and is then amplified by a low noise amplifier 6 to be delivered as an output. The phase shifter 3 is confined together with the receiving filter 5 and the amplifier 6 in a cryostat 8, and the phase shifter 3 as well as the receiving filter 5 and the amplifier 6 are cooled down by cooling means 9 through a cold stage 9a, whereby the thermal noises generated therein are reduced to a minimum.
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申请公布号 |
US6480706(B1) |
申请公布日期 |
2002.11.12 |
申请号 |
US19990466062 |
申请日期 |
1999.12.17 |
申请人 |
NTT MOBILE COMMUNICATIONS NETWORK, INC. |
发明人 |
MIMURA TETSUYA;SATOH KEI;NARAHASHI SHOICHI;NOJIMA TOSHIO |
分类号 |
H01Q1/36;H01Q3/36;H04B1/036;H04B1/18;H04B7/08;(IPC1-7):H04Q11/12 |
主分类号 |
H01Q1/36 |
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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