Injection-locked Self-oscillating Mixer Research Articles

Millimeter-Wave CMOS Sourceless Receiver Architecture for 5G-Served Ultra-Low-Power Sensing and Communication Systems

In this paper, an extremely low-power and low-complexity CMOS sourceless millimeter-wave (mmW) receiver for the next-generation wireless communication and sensing systems including fifth-generation (5G) is proposed and demonstrated. It makes the use of injection-locked self-oscillating mixers (SOMs) in order to enable a direct conversion to baseband without resorting to any external local oscillator (LO) nor an IF processing block, therefore, greatly reducing power consumption, as well as the receiver’s complexity. This architecture is created through multi-input and multi-output (MIMO) arrays in connection with slicing frequency spectrum or frequency band of interest. In this way, the proposed receiver supports a high data transmission throughput based on the frequency-diversified MIMO, which presents a unique feature in the architectural implementation of a low-power and high bit-rate communication and sensing systems. Transmission and demodulation of a digital modulated signal M-quadratic-amplitude modulation (M-QAM) at 40 GHz, is successfully demonstrated with simulated and measured results.

Ultralow Power Injection-Locked GFSK Receiver for Short-Range Wireless Systems

This brief presents a novel CMOS Gaussian frequency-shift keying (GFSK) receiver with an ultralow power consumption, which is based on the injection-locking technique for short-range wireless systems. Additionally, through reducing the oscillation current amplitude of the injection-locked oscillator, the GFSK receiver sensitivity is significantly improved. While comprising a submilliwatt low-noise amplifier, a trifilar transformer splitter, and an injection-locked self-oscillating mixer, the proposed receiver is fabricated using a 90-nm CMOS 1P9M technology. Measurement results indicate a sensitivity of -81 dBm, with a power consumption of 1.8 mW, when a Bluetooth GFSK signal with a data rate of 1 Mb/s is received.

A Retro-Directive Antenna Array With Phase Conjugation Circuit Using Subharmonically Injection-Locked Self-Oscillating Mixers

In this paper, a novel phase conjugation circuit and its application to retro-directive antennas are presented. The phase conjugation circuit uses a balanced circuit structure with subharmonically injection locked self-oscillating mixers oscillating at /spl omega/. In the operation, an input signal at /spl omega//2 is converted to its conjugated signal with no external source required for LO signal pumping, and the output signal frequency is locked at the same frequency of the input signal. The developed phase conjugation circuit is implemented with active antennas to become a retro-directive antenna array. Both the theoretical and measured results of phase conjugation and retro-directive performance are shown in good agreement.