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This paper presents a new miniature Microstrip Bandpass Filter optimized and validated for DCS (Digital Cellular System) Band. The proposed filter is based on a Microstrip resonator. Each port has a step impedance feed line that can be used to adapt the filter's input impedance to the characteristic impedance Z0. The suggested filter is installed o...
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... achieve miniature planar filters, we can use Dualmode resonators. As shown in Figure 1, Microstrip dualmode resonator has a two-dimensional (2-D) symmetry: The number of resonators required for an n-degree filter is cut in half by using a dual-mode resonator as a double tuned resonant circuit [10][11]. This filter operates as the shunt-resonator with the design is described by the following equations [10][11][12][13][14]: ...
Citations
... Several band passes due to their specific characteristics, which means a high selectivity, deep transmission zeros, wide rejection band, an abrupt roll-off rate, and tunable conduct, filters have a special place in radio frequency (RF) receivers. This is especially true given the speed at which wireless communication systems are developing [16]− [18]. Band pass filters are used in a wide range of wireless communication systems, particularly microwave systems with limited space for microwave components and circuits [19]− [23]. ...
This study proposes a new design of low-cost dual-bandpass filter for worldwide interoperability and microwave access (WiMAX) band at
3.50 GHz and mobile communications band at 1.19 GHz. A high pass filter and a stopband filter make up the new dual-bandpass filter structure. Different theoretical studies were carried out for the design of the proposed filter. This filter’s base is a RO5880 substrate with a dielectric permittivity constant of 2.2, loss tangent of 0.0009 and 1.6 mm thickness. High mashing density was used to validate the various simulated structures while accounting for two numerical methods: the moment technique and the finite integration method. The final circuit's overall dimensions are 60×178,3 mm2.
The filter's reduction in size becomes a significant difficulty because it frequently has a considerable impact on the wireless system's overall dimensions. This chapter's goal is to introduce fresh ideas that have been made to shrink filters that yet perform admirably. Then, a variety of filters that have been created are revealed. Some microstrip filters are miniaturized using coupled lines, quasilumped elements, and stub topology, and other structures are based on resonators. The structures presented are optimized and validated for different frequency bands (GPS, DCS, ISM, mobile phone, WIMAX). The filter is introduced in its overall context. Using ADS, HFSS, and CST-MWS, a full-wave electromagnetic analysis has been successful in assessing the electrical performances of the suggested structures.
