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A compact dualband bandpass-to-bandstop tunable filter based on short stub loaded stepped impedance resonators is designed. It uses pin diode for bandpass-to-bandstop filter transformation and varactor diodes for tuning of the center frequency. The filter is designed on Taconic RF-35 substrate to obtain two close dualbands with tuning of center frequencies in the range 1.66–1.88GHz and 1.98–2.29GHz...
In this research article, a compact dual band asymmetric coplanar strip-fed printed antenna is designed and presented for Bluetooth, WLAN/WiMAX and public safety applications. The dual frequency operating bands (2.45 GHz and 5.25 GHz) have been achieved by attaching two simple meander shaped radiating strips to the ACS feed line. The proposed antenna geometry is printed on a low cost FR4 substrate...
In this research paper, a compact, novel O-shaped ACS fed dual-band monopole antenna for 2.4 GHz Bluetooth/WLAN, 4.9 GHz US public safety band and 5.0 GHz WLAN/WiMAX applications is presented and investigated. The proposed geometry consists of an O-shaped radiating branch, monopole-shaped radiating branch and a rectangular shaped uniplanar ground plane, which occupies an overall size of 20 × 12.5...
In this paper a simple and planer new structure of dual band microstrip band pass filter (BPF) is proposed. The structure of the filter consists of stub loaded Interdigital Structure (IDS) sandwiched between two hairpin structures. Combination of IDS and hairpin structure achieves pass band response and stub loaded to IDS finger divides this pass band into two parts to create dual pass band behavior...
This paper demonstrates a new structure of dual band microstrip bandpass filter (BPF) by cascading an interdigital structure (IDS) and a hairpin line structure. The use of IDS improves the quality factor of the proposed filter. The size of the filter is very small and it is very compact and simple to design. To reduce size of the proposed filter there is no use of via or defected ground structure...
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