Novel phase locked source module

Abstract

The invention discloses a novel phase locked source module. The module comprises a phase lock chip, a control module, a VCO, a configuration downloading module, a temperature complementation crystal oscillator and a power amplifier. The phase lock chip is the ADF406 phase lock chip of the ADI company. A programmable frequency divider and a phase discriminator can be integrated in the phase lock chip with quite high frequency resolution. A single chip microcomputer port is arranged on a phase locked source circuit, so automatic correction within quite small frequency deviation can be achieved. According to the invention, by fully using the high resolution of the phase lock chip, and combining the developability and flexibility of the program of the single chip microcomputer, an objective to carry out the automatic correction within quite small frequency deviation can be achieved. By adopting an externally-arranged independent VCO, quite small phase noise is achieved and a purer spectrum source is provided for the next grade. A micro-strip coupling mode which is quite low in energy consumption is adopted in the phase demodulation link, so power loss can be greatly reduced. An indicator lamp through which phase lock states can be observed is added.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a novel phase-locked source module. Background technique [0002] The prior art is formed by connecting four independent modules of a phase detector, a loop filter, a voltage-controlled oscillator (VCO), and a programmable frequency divider. like figure 1 As shown, the voltage-controlled oscillator gives a signal, one part is used as output, and the other part is compared with the local oscillator signal generated by the phase-locked chip through frequency division. In order to keep the frequency unchanged, the phase difference is required not to change. If If there is a change in the phase difference, the voltage at the voltage output terminal of the phase-locked chip will change to control the VCO until the phase difference is restored to achieve the purpose of phase-locking. This keeps the frequency and phase of the controlled oscillator in a deterministic relationship to...

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Problems solved by technology

[0004] ①The output power of the phase-locked source is small, basically about 5dBm

[0005] ②For the frequency source of point frequency, due to long-term work, temperature environment, pressure environment, aging of components, etc., the frequency will shift, and automatic correction cannot be realized in a small frequency

[0006] ③Most of the existing technology uses a phase-locked chip integrated with a voltage-controlled oscillator, a phase detector, and a programmable frequency divider, but while providing convenience, it cannot guarantee a sufficiently low phase noise

[0007] ④The VCO output still adopts the structure of T-type power splitter, which causes excessive power loss

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