Due to the progression growth of multiservice wireless communication systems in a single device, multiband bandpass filter has attract great attention end user. Therefore, is crucial component transceivers which can support multiple services one device. This paper presents design dual-band at 2.4 GHz and 3.5 for WLAN WiMAX applications. Firstly, wideband designed center frequency 3 based on qua...

An ultra wideband common-mode filter based on coupling multiple resonance points is proposed in the letter. The resonant are realized by four compact defected ground structure (DGS) cells, of which both ends C-type DGS cells and middle H-type cells. size these units different, leads to their different points. Because close distance between inductors generated them, can be used for smoothing fil...

A planar triple-band monopole antenna with a U-shaped stripline and a L slot is presented. The antenna is very compact with a size of 20 × 30 × 1.5mm3 and fed by a 50 Ω microstrip line with a defected ground. The measured −10 dB impedance bandwidth of the proposed antenna covers 2.33 GHz–2.51GHz, 3.25 GHz–3.82 GHz, and 4.83 GHz–8.4GHz, respectively, which meets the specifications of WLAN 2.4/5....

In this paper, complementary split ring resonators (CSRRs) as band-stop elements are used in combination with coupled microstrip lines as high and low pass elements to design and fabricate very compact bandpass filter (BPF) having controllable characteristics. The proposed filter provides several advantages such as compactness (occupying area less than 0.1λg × 0.1λg in which λg is calculated at...

A design of compact ultra wideband (UWB) microstrip bandpass filter (BPF) with tunable notch response of wireless communication system is presented in this paper. The five order bandpass filter was designed using optimum distributed highpass integrated with Defected Microstrip Structure (DMS). The bandpass filter was designed at wideband frequency from 2.96 GHz to 10.1 GHz. The insertion loss a...

One compact microstrip low-pass filter using conventional elliptical headed dumbbell shaped

A scheme for designing reconfigurable parallel-coupled-line bandpass filters using a SPDT MEMS switch, capable of operating at two different passband is presented. The spurious resonance of the filter has been removed by using defected ground structures to obtain better stopband performance. A proto-type filter with passband center frequency around 3.5 GHz and 5.0 GHz has been designed. The sim...