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A Ku-band wideband power amplifier (PA) for frequency modulated continuous wave (FMCW) radar application is proposed and implemented in 65-nm bulk CMOS technology. To obtain low group delay, low amplitude ripple, and wide bandwidth, the transformer and inductor-based matching network is designed to meet the requirements. Including pads, the PA occupies a compact chip area of 0.62 mm2. Consuming 118-mA...
An analog baseband chain for a synthetic aperture radar (SAR) receiver is presented in this paper. The proposed analog baseband chain consists of a 12th-order bandpass filter (BPF) and a five-stage programmable gain amplifier (PGA). The BPF is composed of six cascaded Biquads and the switched-RC arrays are used to enable digital control of the passband in a frequency range from 0.68 to 9 MHz. The...
This paper presents two millimeter wave PAs realized in a 130 nm CMOS process. The power amplifier adopts transformer and transmission line matching topology which achieves small area and broadband. One power amplifier focus on low power and the other focus on broadband. The low-power power amplifier operates from 1.2 V supply with 10 dB gain at 62 GHz, and dissipates 58 mW DC power. Reverse isolation...
An X-band co-aperture microstrip transceiver array antenna with the same frequency is designed in this paper. The content is as follows. With the purpose to reduce the effect of radiation created by feed network to radiation pattern, the multilayer structure is adopted and the feed network is placed in the lower layer of the antenna. This method can also expand the working bandwidth to some extent...
Synthetic aperture radar (SAR) that complements optical imagers with capabilities to acquire imagery during night and inclement weather is indispensable for remote sensing, traffic mapping, etc. Recent unmanned aerial vehicles (UAVs) have been miniaturized to <1m3, providing an inexpensive and flexible platform for SAR imaging applications. Besides, there is increasing demand on the high resolution...
This paper describes the development of a Ka-band Helix Travelling Wave Tube (TWT) for Millimeter wave Power Modules (MMPM). Measurements show that the TWT is capable to deliver output power of more than 100W with a high overall efficiency of 50% over 2 GHz bandwidth in Ka-band under the condition of equal input power. The TWT also has a compact package size of 280mm(L)×60mm(W)×40mm(H) with a light...
This paper describes the design and simulated performance of 18-40GHz MMIC low noise amplifier (LNA). A three stages amplifier has been designed and developed using 0.15um gate length GaAs/InGaAs/AlGaAs pHEMT technology. Self-biased and resistive matching technologies have been used to enhance the electrical specifications like return loss and gain flatness. The simulated data shows better than 3...
In this paper, Smart Antennas and HSDPA technology in TD-SCDMA will be discussed. It is demonstrated to be inefficient when they are combined together due to the shortage of channelization code resources. To use Smart Antennas more efficiently in TD-SCDMA HSDPA, one SDMA algorithm with combination of generic schedule algorithms is proposed. With SDMA, the system can allocate same channelization codes...
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