Compact two pole bandpass filter using symmetrical composite right/left handed transmission line with vias (original) (raw)
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This paper suggests the design of a compact two-pole bandpass filter based on the via-free composite right/left-handed (CRLH) metamaterial transmission line (TL) structure with radial stubs. The Bandpass Filter (BPF) design uses these subwavelength resonators (CRLH unit cell) along with admittance inverters to control the coupling. It is found that the suggested method enables up to 70% size reduction from the conventional filters such as the parallel coupled type which is generally designed on the basis of the half-wavelength resonance. The proposed technique is validated by experimental results.
Design of a dual band metamaterial band pass filter using zeroth order resonance
This paper suggests the design of a novel miniaturized dual-band bandpass filter based on the composite right/left-handed (CRLH) metamaterial structure. In detail, subwavelength resonators are realized through the zeroth order resonance (ZOR), and inverter structures are proposed to control the coupling between neighboring ZOR resonators.
IEEE Transactions on Microwave Theory and Techniques, 2000
This article presents the design and uncertainty analysis of twolayer dichroic employing rectangular slot lattice for a two-channel QON. The discrepancy between the simulated and measured insertion losses can be partly attributed to the fabrication errors, i.e., the ISD variation and the UAE. It is shown that the effect of UAE on the transmission performance is much greater than that of ISD variation, and the transmission performance is more prone to the UAE in the X direction rather than that in the Y direction. Therefore, more attention should be paid to the control of UAE of the two-layer dichroic configuration in the X direction during the fabrication process.
Broadband Resonant-Type Metamaterial Transmission Lines
IEEE Microwave and Wireless Components Letters, 2007
In this letter, it is shown that, contrary to previous assumptions, the broadband characteristics of metamaterial transmission lines are not exclusive of the so called loaded composite right/left handed (CRLH) structures. In the balance condition, the typical frequency gap between the left handed (LH) and right handed (RH) transmission bands of these CRLH lines collapses, the characteristic impedance varies smoothly in the vicinity of the transition frequency, and broadband response results. However, through an appropriate design, similar behavior can be obtained in resonant type metamaterial transmission lines, namely transmission lines loaded with complementary split rings resonators. A detailed analysis of the structures, based on the equivalent circuit model is provided, and implications of balancing are pointed out. In this letter, it is clearly demonstrated that broadband balanced CRLH lines can also be implemented by means of the resonant type approach.
Engineering Journal of The Military Technical College (EJMTC), 2017
A microstrip compact size second order bandpass filter for wireless applications is presented. The band pass filter is based on Composite Right/Left handed transmission line. The two resonators are designed using only one composite right left handed unit cell. The bandpass filter has the advantage of compactness (its size is only 2.3 X 2.3 cm 2). A second order band pass filter with centre frequency of 4.77GHZ is designed, simulated and measured. The filter has bandwidth of 200MHz and insertion loss lower than 1.8 dB is achieved within pass band. A good agreement between simulated and measured result was achieved.
2015
A compact and sharp rejection UWB microstrip bandpass filter is developed using left handed metamaterials. For realizing a backward-wave propagation medium, two split ring resonator (CSRR) in the back substrate side and also one series capacitor etched in the host line, are used to produce a negative effective e and μ, simultaneously. Moreover, in the proposed structure, two doublets parallel coupling gaps is placed at each side of the series capacitor. In comparison with the other similar filters, this structure shows a significantly wider passband due to the introduction of a cross-coupling between the feed lines (input and output) which generate four pairs of attenuation poles in the passband. On top of that, using two CSRRs and series capacitor leads to the addition of two extra transmission poles at the lower and upper edges of the filter. Consequently, a compact six-pole ultra-wide bandpass filter is designed and fabricated which exhibits extremely sharp rejection skirts arou...
Band pass filters plays a significant role in wireless communication systems. Transmitted and received signals have to be filtered at a certain center frequency with a specific bandwidth. In this paper, a new microstrip filter pass band at 2.45 GHz is presented; the filter structure is based on the microstrip line with a metamaterial structure, which is assigned on simple rectangular resonators and ribbons. The aim of this work is to study the behavior of the metamaterials structures characterized simultaneously by negative permeability and permittivity at frequency 2.45 GHz and their impact to improve the performances of the transmission line structures. The description of the permittivity and permeability is realized by the Nicolson-Ross-Weir method (NRW) and reported by the software simulation CST.
International Journal of RF and Microwave Computer-Aided Engineering, 2013
In this article, we introduce a new metamaterial complementary electric LC resonator (CELC) and investigate its operational mechanism, characteristics, and potentialities for application in microwave components and devices, such as filters. We consider the excitation of CELC by the electric and magnetic fields of microstrip lines and its resonance characteristics by the diagrams of effective permittivity (e eff) and permeability (l eff). A circuit model is obtained by the consideration of its coupling with the loaded microstrip line. We then realize a novel left-handed (LH) cell by the combination of the CELC resonator and a short circuited stub. It is designed by the least mean square method. We finally use the cascade connection of such LH cells for the design of a miniaturized narrow-band bandpass filter with high out of band rejection. V