Compact wide-stopband quad-band bandpass filter with tunable transmission zeros

Hsu, Ko-Wen; Tu, Wen‐Hua

doi:10.1109/mwsym.2012.6258279

Cited by 7 publications

(2 citation statements)

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“…In [4], the quad-band BPF with compact size was achieved by using two cascaded quad-mode resonators. For further size reduction, multilayer circuit structure has been used in quad-band BPF design [5]. However, this structure increases the cost and fabrication difficulty.…”

Section: Introductionmentioning

confidence: 99%

A Novel Quad-Band Bandpass Filter Using Short Stub Loaded E-Shaped Resonators

Yan

Tang

Wang

2015

IEEE Microw. Wireless Compon. Lett.

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In this letter, a novel quad-band bandpass filter (BPF) using short stub loaded E-Type resonators is proposed. Two sets of resonators are utilized and respectively designed to realize Filter 1, operating at 2.4 and 3.5 GHz, and Filter 2 with two very closely spaced passbands, operating at 5.2 and 5.8 GHz. Then the two dual-band BPFs are combined by common feed lines with interdigital capacitance structure for quad-band responses, and two more transmission zeros (TZs) are achieved by strengthening the source-load coupling. The measured result of the fabricated filter agrees well with the simulation, which shows that the proposed structure is a good candidate for quad-band BPF designs and validates the proposed design flow well.Index Terms-Dual mode resonator, quad-band bandpass filter, short stub loaded E-type resonator, source-load coupling.

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Section: Introductionmentioning

confidence: 99%

A Novel Quad-Band Bandpass Filter Using Short Stub Loaded E-Shaped Resonators

Yan

Tang

Wang

2015

IEEE Microw. Wireless Compon. Lett.

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“…A triband BPF using stub-loaded resonator and defected ground structure (DGS) resonator is proposed [7]. Based on a double-layered substrate structure, two quad-band microstrip BPFs are studied [8], [9]. To save circuit size, quad-band BPFs based on common multiple-mode stub-loaded resonators, SIRs, or semilumped resonators are proposed [10]- [15].…”

Section: Introductionmentioning

confidence: 99%

Design of Sext-Band Bandpass Filter and Sextaplexer Using Semilumped Resonators for System in a Package

Hsu

2015

IEEE Trans. Compon., Packag. Manufact. Technol.

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In this paper, using semilumped resonators, one sext-band bandpass filter and one sextaplexer are proposed. The two circuits are fabricated using microstrip technology, and the semilumped resonator consists of two identical microstrip lines and a chip inductor at the center. In comparison with conventional half-wavelength uniform resonator, the semilumped resonator is compact and has better control over harmonic frequencies. In addition, the two circuits utilize a distributed coupling technique to integrate bandpass channel filters. This technique has a low loading effect resulting in a high design freedom that is essential for multiband circuits. IndexTerms-Multiband bandpass filters (BPFs), multiplexers, semilumped resonators.

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