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This paper presents a design approach for a broadband and high efficiency harmonic-tuned power amplifier (PA) based on a low-pass filtering (LPF) matching network (MN). The MN is composed of quasi-lumped open stubs (λg/8<l< λg/4). Compared with widely used conventional Chebyshev LPF matching networks, the proposed output matching network provides a good approximation of desired lumped elements...
This paper presents the evaluation of nonlinear distortion in reconfigurable Ultra-wideband (UWB) filter. An optical switch is used to switch the filter from bandpass to band stop response at the same UWB spectrum. The switch, which comprises of a silicon dice activated using near infrared light is investigated and the filter is evaluated for potential nonlinearity due to the presence of the switch...
A novel, compact, and highly selective dual-mode microstrip bandpass filter with a switchable notched band is presented. A notched band is developed by employing an open-circuited stub which can be switched by a pin diode to avoid WLAN interferences (5.8 GHz) within the spectrum. The proposed filter achieves a significant size reduction (8.5 mm × 7.1 mm) as compared to conventional dual-mode filters...
A novel, compact and highly selective microstrip bandpass filter with bandwidth reconfigurability for ultra-wideband (UWB) applications is presented. The proposed design uses stepped impedance resonator (SIR) for realization of bandpass filter (BPF) and employs a single varactor diode (BB135-NXP) for the purpose of reconfiguring bandwidth. Additionally, to improve the selectivity between passband...
A miniature optically reconfigurable ultra-wideband CPW bandpass filter is proposed. With the optical switch in the ON state (200W), the circuit behaves as a bandpass filter while in the OFF state (0W), the circuit behaves as a bandstop filter within the same frequency band. The simulation results of the proposed bandpass/bandstop filter are presented.
This paper presents a third order ultra-wideband filter (3.1 GHz – 10.6 GHz) with a reconfigurable WLAN notch at 5.8 GHz. Filter reconfiguration in practice may be achieved by a switching element such as RF MEMs, a PIN diode or an optical switch. The switching element was modeled in simulation as a variable conductance line. The filter response shows a sharp rejection of the WLAN band and very low...
This paper presents a high linearity reconfigurable ultra-wideband (UWB) filter. The proposed structure is able to achieve high performance with good linearity and no significant loss. A single PIN diode (BAP65–02) is used to switch the filter from a bandpass to a bandstop response at the same UWB spectrum. An optical switch, comprised of a silicon dice activated using near infrared light is also...
This paper presents an optically reconfigurable microstrip ultra-wideband filter. A single optical switch comprised of a silicon wafer is activated using near infra-red light to select between either a bandpass or bandstop response. With the switch in the ON state, the circuit behaves as a bandpass filter while in the OFF state, the circuit behaves as a bandstop filter in the same frequency band....
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