2016
DOI: 10.5515/jkiees.2016.16.3.164
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A Dual-Band Through-the-Wall Imaging Radar Receiver Using a Reconfigurable High-Pass Filter

Abstract: A dual-band through-the-wall imaging radar receiver for a frequency-modulated continuous-wave radar system was designed and fabricated. The operating frequency bands of the receiver are S-band (2-4 GHz) and . If the target is behind a wall, wall-reflected waves are rejected by a reconfigurable Gm-C high-pass filter. The filter is designed using a high-order admittance synthesis method, and consists of transconductor circuits and capacitors. The cutoff frequency of the filter can be tuned by changing the refere… Show more

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Cited by 10 publications
(8 citation statements)
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“…Thus, to utilise the wideband performance of the aforementioned configuration, a novel structure is required. One of the significant virtues of this new approach is the feasibility of achieving reconfigurable frequency by using either a switchable PIN diode or a tunable varactor diode [18][19][20][21][22][23]. Accordingly, the antenna geometry shown in Fig.…”
Section: Reconfigurable Antenna Using Diodesmentioning
confidence: 99%
“…Thus, to utilise the wideband performance of the aforementioned configuration, a novel structure is required. One of the significant virtues of this new approach is the feasibility of achieving reconfigurable frequency by using either a switchable PIN diode or a tunable varactor diode [18][19][20][21][22][23]. Accordingly, the antenna geometry shown in Fig.…”
Section: Reconfigurable Antenna Using Diodesmentioning
confidence: 99%
“…The blocker signal is attenuated due to the high input impedance at the blocker frequency, but a large blocker signal can still generate the IMD3 component at the LNTA output. To reduce the IMD3 component, a transconductor linearization method from [3] is adopted. Figure 3-(a) shows the wideband receiver with a linearized transconductor.…”
Section: Receiver Architecturementioning
confidence: 99%
“…Recently, receiver architectures that can process multiple standards at different frequency ranges have been researched widely [1], [2]. Radar receivers that deal with dual-band input signals have also been researched [3]. These generalpurpose receivers and radar receivers are designed without RF bandpass filters or surface acoustic wave (SAW) filters, which have limited bandwidth within a certain frequency range.…”
Section: Introductionmentioning
confidence: 99%
“…A switchable bandpass/bandstop filter has received particular attention as it enables radio systems to be operated in an interference-congested environment [1], reduces the size [2], solves the complexity problem [3], and reduces the cost [4,5,6,7]. For a dynamic interference situation, the bandpass/bandstop filters (BPF/BSF) are used in the bandstop mode to reduce the high-power interference close to the desired signal, while the bandpass filter is selected for a lower interference environment [8].…”
Section: Introductionmentioning
confidence: 99%