发明名称 |
Ferroelektrisk modulator |
摘要 |
A method of modulating a microwave carrier and a modulating device are disclosed make it possible directly, onto a microwave carrier right at the operating frequency, to modulate an information signal from a digital bit-stream without the use of a conventional up-conversion chain or frequency multiplication after the modulation. A fast ferroelectric element is provided and operated with a variable voltage source controlled directly by the digital bit-stream representing the information to be modulated. The element can either be positioned between a microwave power amplifier and a radiating antenna device or even close in front of the antenna such that a collimated beam must pass through the modulation device. The element will then be able to introduce phase modulation of a passing microwave carrier. |
申请公布号 |
SE521870(C2) |
申请公布日期 |
2003.12.16 |
申请号 |
SE19990000646 |
申请日期 |
1999.02.24 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) |
发明人 |
KENT FALK;RAGNAR ARVIDSSON |
分类号 |
H01Q3/44;H03C7/02;(IPC1-7):H03C7/02;H04L27/20 |
主分类号 |
H01Q3/44 |
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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