A Compact via-Less Metamaterial Wideband Bandpass Filter Using Split Circular Rings and Rectangular Stub

Abstract

Abstract-A compact via-less metamaterial (MTM) wideband bandpass filter using split circular rings, meander-line and rectangular stub is reported in this letter. The split circular rings produce series capacitance and a meander line along with a rectangular stub gives shunt inductance and capacitance. The measured insertion loss has 0.60 dB and return loss above 15 dB with 3 dB fractional bandwidth 74.28% at centre frequency 3.25 GHz. The zeroth order resonance frequency of proposed filter is guarded by shunt parameters due to its open ended boundary condition. The electrical size of the suggested filter is 0.12λ g × 0.22λ g at ZOR frequency of 2.3 GHz. The designed structure has been fabricated and experimentally validated. The designed filter offers group delay variation between 0.2ns to 0.7 ns within the passband. It is suitable for WLAN, WiMAX, Bluetooth applications.

A multilayer low parasitic parameter extraction method for synthesis of composite right‐left handed TL

“…The designed algorithm in summarize is designing Z section for the known L R and C L , then obtaining the value of 2C p by using relation (9), in the next step, finding the L L and C R by using relation (12) balanced conditions and at the end obtaining C R from relation (10) and designing the Y section for C R and L L . previous sections are investigated.…”

“…In order to find these parameters, Equation (11) is used and L R = 8.839 nH and C L = 1.433 pF are obtained. Then, from (12), L L = 7.164 nH and C R = 1.768 pF are determined. As mentioned previously, the Z part is designed, firstly.…”

“…The tunable nonconventional electromagnetic properties resulted in the synthesis and fabrication of composite right‐left handed (CRLH) structures for achieving metamaterials . These structures have been rapidly used in science and industry with multi‐banding bandwidth enhancement compaction of microwave and antenna devices . A CRLH structure is comprised from a series resonator and a parallel one.…”

“…1,2 These structures have been rapidly used in science and industry with multi-banding 1,3-7 bandwidth enhancement [8][9][10][11] compaction of microwave and antenna devices. [11][12][13][14][15] A CRLH structure is comprised from a series resonator and a parallel one. The series resonator is consisting of a right-hand inductor and left-hand capacitor, and the parallel resonator consisting of the left-hand inductor and the right-hand capacitor which are created for constructing the desired lower and upper bands, respectively.…”

A Miniaturized Wideband Bandpass Filter Using Quarter-Wavelength Stepped-Impedance Resonators

“…The direct sequence ultra-wideband (DS-UWB) specifications for wireless personal area networks (WPANs) is further divided into a low band of 3.1-5.1 GHz and a high band of 6.2-9.7 GHz, to avoid the frequent use of IEEE 802.11a wireless local area networks (WLANs) at 5-6 GH. As one of the important component blocks, some wideband BPFs were developed to obtain the desired fractional bandwidth (FBW) [3][4][5][6][7][8][9][10][11][12][13][14][15].…”