A V-Band Broadband Frequency Multiplier Circuit with High-Speed Bpsk Modulation

A V-band frequency doubler and tripler circuits are being developed and designed in this project for 60 GHz wireless communication based on the experiences of development of high-frequency semiconductor devices and the technique for microwave/millimeter-wave circuit design in Department of Electronics, Chang Gung University. To achieve a V-band communication system integrated transmitter and receiver chips, the performances of the multiplier circuits must be investigated with wide bandwidth, high conversion efficiency, low output phase noise, and high output power level. The circuit topology of the proposed multipliers is designed by using a conventional differential-type BPSK modulator. By investigating the second- and third-order harmonic signals with different biases on transistor, a multiplier circuit including a function of BPSK modulation which can directly generate a high data rate modulated signal will be implemented. The wide bandwidth and high fundamental signal suppression characteristics also can be achieved by using the technique of differential phase compensation with an input broadband balun. In order to provide a local oscillation signal to the multiplier circuits, a voltage-controlled oscillator or an injection-locked oscillator will be arranged for a direct frequency conversion with digital signal modulation. The frequency tripler MMICs with BPSK modulation and the maximum data rate of 2.5 Gbps has been designed and fabricated by using PHEMT and CMOS processes at 60 GHz band. Considering that a millimeter-wave chip integration including the improved passive and active components can reduce the high-frequency signal loss and dc power consumption, a subsystem integrated amplifier, oscillator, and modulator circuits is being developed by using advanced CMOS technique. The millimeter-wave broadband frequency doubler and tripler with 20 GHz wide locking-range injection-locked oscillator will be successfully implemented and operated having the characteristics of a bandwidth over 15 GHz and high output saturation power of -5 dBm. The digital data rate can be increased over 3 Gbps.

Project ID:PB10109-0079
External Project ID:NSC101-2218-E182-007