#Band pass filter designer series#

#Band pass filter designer series#

To improve the performance of filter proposed by, an X- band bandpass filter was proposed by, using only square- type, series SRRs. The filter was developed on a microstrip structure and the effects of varying the ring gaps, ring separation and ring widths were investigated. In this paper, a square split ring resonator along with complementary split ring resonator-based design of microstrip bandpass filter is proposed.Ī circular split ring resonator based bandpass filter was proposed by to operate at a frequency of 9 GHz. Microstrip band-pass filters are a better alternative when it comes to size considerations and cost of manufacturing. Although these filters provide a good performance and power handling capacity, the drawback of these is that they are bulky and not easy to integrate in miniaturized environments. These include waveguide resonator filters having unit cells of SRRs and CSRRs and Substrate Integrated Waveguide (SIW) filters having Stepped Impedance CSRR unit cells. īand pass filters using metamaterial structures have been previously proposed. In order to enhance the magneticĬoupling between the microstrip line and SRRs, the preferred topology for these resonators is the square type. Various metamaterial structures can be considered artificial resonators as complementary split ring resonator (CSSR) and spiral resonators, but the most popular are circular and square type split ring resonators. Due to their low radiation losses, high-performance characteristics and small electrical length at resonance, researchers have been investigating various ways to use SRR based structures to improve microwave devices. Split Ring Resonators (SRR), which is an artificial structure of two concentric annular rings with splits on opposite sides, is an example of a DNG material. These are also known as Double Negative (DNG) materials and give rise to a negative refractive index, a property not seen in natural materials. Metamaterial based structures have been proposed theoretically as artificial materials having both electric permittivity and magnetic permeability negative. Many microstrip filter designs have been proposed for size miniaturization and performance enhancement in the past few decades but there are still some areas for improvements. The size of these filters is very large at the lower end of microwave frequencies. There exist bandpass and band-stop filters with half wavelength and quarter wavelength resonators. Low frequency filters can be created using lumped elements, with capacitors and inductors connected using a line printed on the printed circuit board (PCB). Filters can be designed in various ways and by using different components. Couplers, power dividers, filters and antennas are being designed to achieve a miniaturized design for a better performance. The fast-paced development of wireless communications presents a great demand for compact microwave devices. KeywordsMetamaterial Bandpass Filter Split Ring Resonator Complementary Split Ring Resonator CST Microwave Studio The computer-aided design (CAD) and frequency domain simulations are performed using commercial simulator, CST Microwave Studio. The advantages of the proposed filters, namely, high in-band return loss, low passband insertion loss and compact size, have been reported. Designs with multiple SRRs and CSRRs are also proposed and their performances are compared. The proposed filter is composed of symmetrical square shaped Split Ring Resonators (SRRs) and Complementary Split Ring Resonators (CSRRs), coupled parallelly to a microstrip line on a Rogers substrate. Metamaterial based bandpass filter design for operation in X-band (9.1GHz) is proposed in this paper. In recent decades, metamaterial- based structures have been incorporated in design of passive microwave devices, one of them being filters. School of Electronics Engineering Vellore Institute of Technology Vellore, IndiaĪbstract Bandpass filters have a variety of applications in fields of wireless engineering. X-Band Metamaterial Bandpass Filter Design