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Broadband injection locking frequency multiplier

A technology of injection locking and frequency multiplier, applied in power oscillators, electrical components, etc., can solve problems such as narrowing of locking range, achieve low power consumption, ensure good performance, and expand transimpedance gain and bandwidth

Active Publication Date: 2020-02-11
SOUTHEAST UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But when the input power is reduced, the locking range will narrow rapidly

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] The embodiment of the present invention aims at the problem that the traditional injection-locked frequency multiplier has a wide locking range under high-power input, but the locking range will narrow rapidly when the input power decreases, and adopts a double-injection structure, such as figure 1 As shown, it includes the first and second harmonic generators and an injection-locked oscillator; the harmonic generator is used to generate nth harmonic signals (n=2, 3, 4...), and the injection-locked oscillator is used for Lock the harmonic signal generated by the harmonic generator; two harmonic generators and an injection-locked oscillator are connected through a transformer coupling composed of their own internal inductance; the two harmonic generators convert the input fundamental wave signal into The two harmonic signals are then respectively coupled to the injection-locked oscillator through a transformer to achieve frequency doubling.

[0027] The first harmonic ge...

Embodiment 2

[0029] The embodiment of the present invention increases the input buffer and the output buffer on the basis of the first embodiment, such as figure 2 As shown, two harmonic generators and an injection-locked oscillator form the core circuit of the broadband injection-locked frequency multiplier. The broadband injection-locked frequency multiplier includes a core circuit, an input buffer and an output buffer, the input buffer is connected to the input end of the core circuit, and the output buffer is connected to the output end of the core circuit; the above-mentioned connection mode can be direct coupling, transformer coupling or AC coupling.

Embodiment 3

[0031] The broadband injection-locked frequency multiplier disclosed in the embodiment of the present invention is a broadband injection-locked frequency multiplier that can realize frequency doubling, and its circuit is as follows image 3 As shown, it contains two harmonic generators that generate the second harmonic and an injection-locked oscillator. The two harmonic generators include: common-source first transistor M1 and second transistor M2, common-source third transistor M3 and fourth transistor M4, first coupled inductor L1 and second coupled inductor L2, and first capacitor C1 and the second capacitor C2; the first transistor M1, the second transistor M2, the first coupled inductor L1, and the first capacitor C1 constitute the first harmonic generator, the third transistor M3, the fourth transistor M4, the second coupled inductor L2, The second capacitor C2 constitutes the second harmonic generator; the gate of the first transistor M1 is connected to the positive in...

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Abstract

The invention discloses a broadband injection locking frequency multiplier, which adopts a double-injection structure and comprises two harmonic generators and an injection locking oscillator. The harmonic generators are used for generating harmonic signals of two or more times, the injection locking oscillator is used for locking the harmonic signals generated by the harmonic generators, and thetwo harmonic generators and the injection locking oscillator are coupled and connected through transformers composed of inductors arranged in the two harmonic generators and the injection locking oscillator. The two harmonic generators convert input fundamental wave signals into two paths of harmonic signals, and then the two paths of harmonic signals are respectively coupled to the injection locking oscillator through the transformer to realize frequency multiplication. Compared with a traditional structure, the broadband injection locking frequency multiplier still has a wide locking range when the input power is small, and has the advantages of being ultra-wide in broadband, low in input sensitivity, low in power consumption, high in integration level and the like.

Description

technical field [0001] The invention relates to a broadband injection-locked frequency multiplier, which belongs to the technical field of radio frequency and analog integrated circuits of microelectronics and solid electronics. Background technique [0002] In recent years, wireless communication technology has developed rapidly, and the development of millimeter wave and terahertz frequency bands has become more and more popular. The design of wireless transceivers with high integration, high bandwidth and low power consumption has become very important. Wireless transceiver systems rely on reliable IF signals for better system performance. As an important part of the intermediate frequency signal generation chain, the frequency multiplier completes the function of multiplying the fundamental frequency. [0003] In the use of intermediate frequency signals, it is necessary to frequently take frequency multiplication measures to improve system performance. In a superheter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B19/14
CPCH03B19/14
Inventor 张有明黄风义唐旭升沈天宇姜楠
Owner SOUTHEAST UNIV
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