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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 illustrate the rapid design and debugging for a high restraint filter, by an example of a filter. we have designed a bandpass filter, which passband is 964MHz to 1029MHz, and at 960MHz the restraint is more than 40dB. The rapid methods include two parts, circuit synthesis and HFSS simulation. The way of debug the filter is by the delay and phase.
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...
A miniaturized and high stopband rejection bandpass filter (BPF) with three finite transmission zeros is presented in this paper. The BPF with a central frequency of 3.2 GHz and 200 MHz bandwidth is implemented in a novel distributed stripline configuration using LTCC (low-temperature-cofired ceramic) technology. A distinct feature of this filter is excellent out-of-band attenuation performance. The...
This letter outlines the design and manufacture of a UHF-band miniaturized band-pass filter realized by low-temperature cofired ceramic (LTCC) technology for super heterodyne microwave receiver applications. A distinct feature of this filter is the smaller size than conventional filter at such a low frequency and steady pass-band temperature electrical performance compared with surface acoustic wave...
A low-temperature-cofired ceramic (LTCC) bandpass filter with low insertion loss and high image rejection is presented for super heterodyne microwave receiver within 6.5-7.1 GHz band. By improving the filter cell structure, two transmission zeros can be generated to achieve wide-band image suppression from cascading filter cells. The presented method provides the design flexibility of locating these...
A miniaturized and high stopband rejection bandpass filter (BPF) with three finite transmission zeros is presented in this paper. The BPF with a central frequency of 3.4 GHz and 200 MHz bandwidth is implemented in a novel distributed stripline configuration using LTCC (low-temperature-cofired ceramic) technology. A distinct feature of this filter is excellent out-of-band attenuation performance. The...
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