Wide-band microwave local oscillator generator combined direct multiply-frequency with lock phase

Abstract

The invention is concerned with the broad band microwave local-surge generator, it is: the vector-controlled oscillator creates low-voice high-frequency signal to the power divider, the phase-lock circuit, the loop filter in turn, then feedback to the vector-controlled oscillator in order to form the phase-lock loop signal source creating circuit that is the decimal fraction frequency division and reflecting-phase mixed-dispel suppression, the high-frequency signal creating by the circuit passes the frequency multiplier, the filter and the amplifier to get the signal source with different frequency that is needed by the microwave system. The invention can achieve the multi circuit local-surge creation on the veneer with lower cost.

Description

technical field [0001] The invention relates to a broadband microwave local oscillator generator, in particular to a broadband microwave local oscillator generator combining direct frequency doubling and phase locking. Background technique [0002] In the microwave point-to-point communication technology of PDH and SDH, in order not to interfere with the existing communication bands, they generally work in the high-frequency microwave bands of 7GHz, 8GHz or even more than ten G, and have strict requirements on signal quality. Based on this, high-frequency local oscillator generators for microwave frequency conversion are also increasingly developed. The system has the following requirements for the high-frequency local oscillator generator: [0003] 1) Lower cost: Many microwave devices have excellent indicators due to the concentration of the most cutting-edge technology, but at the same time they are expensive. The low-cost realization in the microwave band has become mor...

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Problems solved by technology

[0004] 2) Good phase noise and spurious control performance: This is an important indicator of microwave communication, which directly affects the quality of communication. Now there are mainly direct frequency multiplication technology and microwave phase-locking technology. Direct frequency multiplication technology can achieve better indicators, but broadband and small steps are not easy to achieve; microwave phase-locking technology can achieve low-cost realization of broadband and small steps, but it is currently difficult to achieve high-frequency bands;

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