Injection locked frequency divider based on Lange coupler feedback structure

An injection locking and coupler technology, applied in the direction of automatic power control, electrical components, etc., can solve the problems of reduced locking range, reduced locking range, power loss, etc.

CN105515579AInactive Publication Date: 2016-04-20UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-04-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high-end injection locked frequency divider suitable for millimeter wave frequencies of a CMOS (Complementary Metal-Oxide-Semiconductor) process and a BiCMOS process. The injection locked frequency divider is characterized in that a 140GHz signal and a low-frequency signal are separated through a broadband working feature of a Lange coupler and a high isolation degree between a straight-through port and a coupling port of the Lange coupler in order to obtain a higher output power level; and moreover, phase compensation is performed through a delay line, and a common-emitter common-base transistor structure is adopted, so that a high loop gain is provided, and an isolation degree between an input signal and a feedback signal is increased. Through use of a feedback loop consisting of the Lange coupler, a phase compensation module and a common-emitter common-base transistor circuit, the frequency divider has higher working efficiency, a wide frequency locking range, a high frequency dividing ratio and low power consumption. Thus, the high-end injection locked frequency divider has a great application value in millimeter-wave, particularly millimeter-wave frequency high-end frequency divider circuits. Besides, a frequency dividing circuit can be applied to a circuit system in a terahertz frequency band, but a higher frequency dividing ratio is required.
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Description

technical field

[0001] The invention relates to the technical field of millimeter wave / submillimeter wave frequency division in semiconductor technology, in particular to an injection-locked frequency divider based on a lange coupler feedback structure. Background technique

[0002] Millimeter waves have the advantages of high frequency, wide bandwidth, and large information capacity. They have great application value and market prospects in military radar systems, radio astronomy, space, and short-distance wireless high-speed transmission. And with the rapid development of modern silicon-based processes, processes such as CMOS and SiGeBiCMOS can be used in submillimeter wave / terahertz systems, which replace III-V semiconductor processes that are limited by high cost and low integration. In a high-frequency communication system, the performance of the high-stable frequency source provided by the phase-locked loop affects the performance of the entire system, and the frequenc...

Examples

Embodiment

[0029] Press as Figure 10 As shown, connect the circuit under test. Under different bias voltages, there will be different frequency locking ranges; such as Figure 11As shown, for 1.05V power supply, the frequency locking range is 135-138.8GHz; for 1.1V power supply, the frequency locking range is 136.3-141GHz; for 1.2V power supply, the frequency locking range is 141.2-144.2GHz; For 1.3V power supply, the frequency locking range is 143.8~146.6GHz; for 1.4V power supply, the frequency locking range is 145.5~148.2GHz; for 1.5V power supply, the frequency locking range is 147.4~149.4GHz; for 1.6 When powered by V voltage, the frequency locking range is 148.9-150.2GHz, while the power loss is only 14.4mW.

[0030] Such as Figure 12 As shown, when the input signal frequency is 135GHz, Vcc=1.6V, the size of the output signal is -5.6922dBm, the frequency is 25.033GHz; the phase noise is -121.5813dBc / Hz1MHz; Figure 13 As shown, when the input signal frequency is 150.2GHz, Vcc...