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With the rapid incensement of personal vehicles, urban traffics congestion is now a prominent problem in many major cities in China. Electronic Toll Collection (ETC) is an efficient solution for traffic jaw problem. This paper introduces an embedded system designed for Dedicated Short Range Communications (DSRC) standard based ETC system of China. In this system, a STM8L151G micro controller was used...
A low profile wide-angle scan phased array antenna is designed in this paper. With the tile architecture, profile of the phased array antenna is reduced dramatically; in addition, the main beam of antenna array can steer to the desired direction by combining the invasive weed optimization method with the active element radiation pattern of inter-element, which includes the effects of mutual coupling...
A hybrid approach based on alternative projection method (APM) and differential evolution (DE) algorithm for satellite footprint pattern synthesis of time-modulated arrays (TMAs) is proposed in this paper. Satellite footprint pattern at the center frequency is synthesized by APM firstly, and then sideband level (SBL) is suppressed by DE. To verify the approach, a planar array more than 1500 elements...
The LTE-Advanced and its related market factors present many challenges for the RF power amplifier (PA) and front end designs. This paper reviews some of the emerging techniques such as dynamic supply voltage modulation, reconfigurable PA, FET stacking and power combining to solve these challenges for silicon based PAs. These techniques with advanced CMOS and SiGe technologies can benefit the future...
The majority of the world's RF wireless power amplifiers (PA) products are still designed in III-V semiconductors today. However, by taking advantage of nm silicon devices and novel RF system-on-a-chip (SoC) design techniques, several groups have recently reported highly-competitive silicon RF PAs in both CMOS and SiGe BiCMOS technologies with performance rivaling those of the III-V RF PAs. We will,...
In this paper, a differential SiGe power amplifier (PA) is designed using a bipolar differential pair in a 0.35-μm SiGe BiCMOS technology with through-silicon-via (TSV). Measured using continuous wave (CW) and Long Term Evolution (LTE) modulated waveforms, significant gain expansion (3–5 dB) is observed. The PA reaches power-added-efficiency (PAE) of 61.7% / 51.2% / 40.0% at Pout = 25.6 / 25.4 / 25...
We demonstrated the generation of Nyquist pulses using a dual parallel Mach-Zehnder modulator. 10 GHz to 40 GHz Nyquist pulses with timing-jitter below 258 fs and signal-to-noise ratio more than 30 dB are experimentally generated.
A nonlinear intelligent reentry control method with B-spline functional link network disturbance observer (BFLNDO) is presented for hypersonic vehicles (HSVs). The nonlinear generalized predictive control (NGPC) algorithm is employed to design the nominal control law of the attitude system of the HSV. The output prediction defined on finite horizon is carried out via Taylor series expansion. The unmodeled...
In this paper, a monolithic 2-stage differential power amplifier (PA) is designed and fabricated in the 0.35 µm IBM 5PAe SiGe BiCMOS technology where the through-wafer-vias (TWVs) are available. A cascode topology is adopted to relieve the voltage stress for the power stage transistors. All components are integrated on-chip for the PA except the input/output baluns. The envelope tracking (ET) technique...
We propose and characterize a promising digital coherent receiver for analog photonic link architecture based on a novel I/Q-demodulation module. Using the proposed scheme, signal demodulation of QPSK modulated RF carrier is experimentally demonstrated.
We propose and experimentally demonstrate a novel digital post compensation technique to suppress the third-order intermodulation distortion (IMD3) in intensity-modulated analog optical links incorporating photonic frequency downconversion.
In this paper, the design and measurement results of a highly efficient 1-Watt broadband class J SiGe power amplifier (PA) at 700 MHz are reported. Comparisons between a class J PA and a traditional class AB/B PA have been made, first through theoretical analysis in terms of load network, efficiency and bandwidth behavior, and secondly by bench measurement data. A single-ended power cell is designed...
Multiple microwave frequencies sensing ranging from 15 to 20 GHz is reported based on compressive sampling. A maximum detection error of 150 kHz is achieved using a single ADC with analog bandwidth of 826.75 MHz.
Two-optical-frequency-comb-based RF channelizer is proposed to slice RF band seamlessly and downconvert to multiple IF bands, with rectangular response in each channel. Without special optical filters, 7-channel 500-MHz-step channelizer is reported.
Recognition of sparse multiple RF tones ranging from 15 to 20 GHz is reported based on compressive sampling. Maximum detection error of 60 kHz is achieved using a single ADC with bandwidth of 826.75 MHz.
A monolithic polar transmitter (TX) subsystem that includes a CMOS Envelope Tracking (ET) amplifier and a RF SiGe BiCMOS power amplifier (PA) for mobile WiMAX applications is presented. Several versions of the ET amplifiers are designed and their power consumption and bandwidth considerations are discussed. Consequently, the entire polar TX system performances and design trade-offs are presented and...
A low power consuming intelligent monitor system of tire based on radio frequency technology is designed in this paper. The low consuming power unit, the measurement unit, the agreement of timestamp and the protocol of chain layers are presented in details. The main program flow charts of the measuring terminal and host terminal are given.
This paper presents a large-signal envelope-tracking (ET) polar transmitter (TX) system with a monolithic cascode SiGe power amplifier (PA) for mobile WiMAX applications. The envelope amplifiers are designed in the TSMC 0.35μm SiGe BiCMOS technology and also with discrete components for comparisons. The entire polar TX system using the discrete envelope amplifier in measurement achieves the power-added...
This paper presents a broadband cascode SiGe power amplifier (PA) in the polar transmitter (TX) system using the envelope-tacking (ET) technique. The cascode PA achieves the power-added efficiency (PAE) of >;30% across the frequency range of 0.6~2.4 GHz in continuous wave (CW) mode. The ET-based polar TX system using this cascode PA is evaluated and compared with the conventional stand-alone...
Amplitude shift keying (ASK) and pulse position modulation (PPM) can be used to provide self-synchronized data and clock for wireless implantable neural recoding systems, and therefore simplifies the complexity of the implanted circuits. In this paper, a novel extremely low power receiver designed for such a scheme is discussed. The integrated receiver utilizes inductive load implemented by PMOS device...
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