Results 21 to 30 of about 332 (127)
A Miniaturized Low‐Loss Switchable Single‐ and Dual‐Band Bandpass Filter
International Journal of RF and Microwave Computer-Aided Engineering, Volume 2023, Issue 1, 2023., 2023 In this paper, a novel switchable bandpass filter is proposed. By switching p‐i‐n diodes on/off, the proposed filter can be switched between the single‐band bandpass filter and the dual‐band bandpass filter. The filter is mainly composed of eight pairs of series LC resonators, which generate passbands and transmission zeros. Considering the requirement
Ruonan Mu +5 more
wiley +1 more source
Tunable and reconfigurable bandstop filters enabled by optically controlled switching elements
Electronics Letters, Volume 58, Issue 25, Page 985-987, December 2022., 2022 Abstract The authors report a novel approach for designing tunable and reconfigurable bandstop filters by employing bias‐free optically‐controlled photoconductive radio frequency (RF) switching elements. To verify the effectiveness of the approach, a bandstop filter with two stopbands centred at 4.05 and 4.75 GHz was designed using a split‐ring‐coupled
Peizhao Li +4 more
wiley +1 more source
Engineering Reports, Volume 4, Issue 11, November 2022., 2022 This article presents the enhancement of Legendre Optimum LPF in terms of reusability and bandwidth, based on the programmable memristance of memristors. Results show a bandwidth enhancement of up to 540 at 600 kHz, and up to 100 at 110 MHz. A reusable, cost‐effective, variable bandwidth filter is achieved from the original fixed bandwidth filter ...
Elochukwu Onyejegbu +3 more
wiley +1 more source
Microstrip band-stop filter based on double negative metamaterial [PDF]
, 2022 In this work, we present a novel miniature band stop filter based on double negative metamaterial, this circuit is designed on a low-cost substrate FR-4 of relative permittivity 4.4 and low tangential losses 0.002.
Errkik, Ahmed +2 more
core +3 more sources
A highly selective tri‐band bandpass‐to‐bandstop filter with the third band independently tunable
Engineering Reports, Volume 4, Issue 3, March 2022., 2022 In this article, a tri‐band BP‐to‐BS filter with the third band tunable and the other ones fixed using the crossed resonator is proposed, analyzed and demonstrated. Combined with the proposed coupling structure, the M and Qe can be met to form the tri‐band. The PIN diode is applied as a switch to alter BP‐to‐BS characteristic. Loading varactor diode at
Hong Yang +6 more
wiley +1 more source
International Journal of Antennas and Propagation, Volume 2022, Issue 1, 2022., 2022 Bandstop filters play an essential role in many radio frequency (RF) and microwave communication systems to block undesired signals or reject spurious harmonics. This paper presents the design and experiment of a compact quadband bandstop filter centered at 1.2/1.97/2.96/4.78 GHz with a passband insertion loss ranging from 1.07 to 2.9 dB.
Pierre Moukala Mpele, Chien-Jen Wang
wiley +1 more source
Equiripple design of low‐pass filter using stub‐loaded Z‐shaped coupled‐line section
IET Microwaves, Antennas &Propagation, Volume 15, Issue 15, Page 1899-1913, 16 December 2021., 2021 Abstract Design procedure of a novel transmission line low‐pass filter is presented. The filter has a flexible rejection response for a prescribed cut‐off frequency and an in‐band ripple factor. It is compact by using a Z‐shaped coupled‐line section, which is loaded with open‐circuited stubs.
Xiaodong Huang +4 more
wiley +1 more source
Absorptive Microstrip-Fed Slot Antenna With Wide Reflectionless Band by Loading Bandstop Filter
IEEE Open Journal of Antennas and Propagation, 2021 This paper presents an absorptive microstrip-fed slot antenna with a wide reflectionless band and high radiation efficiency. The proposed antenna consists of a microstrip-fed slot antenna, a quarter-wavelength coupled-line bandstop filter (BSF), and ...
Yanqun Liu +4 more
doaj +1 more source
IET Microwaves, Antennas &Propagation, Volume 15, Issue 9, Page 995-1008, 29 July 2021., 2021 Abstract Analysis and design of a wideband bandstop filter with multi‐transmission zeros (TZs) and reflection zeros (RZs) are presented. The proposed topology consists of N‐1 shunt open‐circuited stubs (OCSs) cascaded through N‐sections of transmission lines, and two M‐sections of OCSs are shunted at two output ports, respectively.
Hongyu Chen, Xiaolong Wang, Geyu Lu
wiley +1 more source
Distortion mechanisms in varactor diode-tuned microwave filters [PDF]
, 2006 This paper examines the broadband distortion behavior in flexible filters employing varactor-diode tuning elements. Series- and parallel-resonant varactor-loaded transmission-lines, both commonly used in bandpass and bandstop microwave filters, are ...
Carey-Smith, BE, Warr, PA
core +2 more sources