Miniaturization of bandstop filter using double spurlines and double stubs

• Autorzy: Angkawisittpan N.

Warianty tytułu

PL

Wykorzystanie podwójnej struktury mikropaskowej i podwójnej pętli do miniaturyzacji filtru pasmowo-zaporowego

• Języki publikacji: PL

Abstrakty

PL

W artykule przedstawiono kompaktowy filtr pasmowo-zaporowy, zawierający podwójne struktury mikropaskowe i podwójne pętle otwarte. Przy projektowaniu wykorzystano metodę różnic skończonych w dziedzinie czasu (ang. Finite-Difference Time-Domain Method).

EN

This paper presents a new type of compact bandstop filter. The proposed filter topology consists of double spurlines and double open stubs. Double spurlines are introduced to a conventional open stub filter for filter circuit size miniaturization and bandstop region improvement. It is clearly shown that the rejection region of the proposed filter is wider and deeper compared to the conventional open stub filter without any cascading circuits or periodic structures. The proposed filter is designed with Finite-Difference Time-Domain Method (FDTD). To validate the proposed topology, a compact filter prototype with bandstop centered at 3.5 GHz is fabricated and transmission coefficient measurements are conducted. Measurements show that there is a rejection region from 1.68 to 5.17 GHz with S21 less than -3 dB. The total length of the prototype equals to 49.2 mm.

Słowa kluczowe

PL

metoda różnic skończonych w dziedzinie czasu (FDTD); filtr pasmowo-zaporowy; filtr pętlowy; podwójne struktury mikropaskowe

EN

finite-difference time-domain; FDTD; bandstop filter; conventional stub filter; double spurlines

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2012
• Tom: R. 88, nr 11a
• Strony: 178--181
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Angkawisittpan N.

• Faculty of Engineering, Mahasarakham University, Mahasarakham, Thailand,

Bibliografia

• [1] Angkawisittpan N., Harmonic suppression of microstrip ring resonator using double spurlines. International Journal of the Physical Sciences, 7(2012), No. 1, 31-36
• [2] Jun D.S., Lee H.Y., Kim D.Y., Lee S.S., Nam E.S., A narrow bandwidth microstrip band-pass filter with symmetrical frequency characteristics. ETRI Journal, 27(2005), No. 5, 643-646
• [3] Akkaraekthalin P., Jantree J., Microstrip slow-wave open loop resonator filters with reduced size and improved stopband characteristics. ETRI Journal, 28(2006), No. 5, 607-614
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• [6] Sung Y.J., Kim M., KIM Y., Harmonics reduction with defected ground structure for a microstrip patch antenna. IEEE Antennas and Wireless Propagation Letters, 2(2003), No. 1, 111-113
• [7] Horii Y., Tsutsumi M., Harmonic control by photonic band gap on microstrip patch antenna. IEEE Microwave and Guided Wave Letters, 9(1999), No. 1, 13-15
• [8] Sung Y.J., Kim Y.-S. An improved design of microstrip patches antennas using photonic bandgap structure. IEEE Antennas and Propogation, 53(2005), No. 5, 1799-1804
• [9] Bates R.N., Design of microstrip spur-line band-stop filters. IEE Journal on Microwaves, Optics and Acoustics, 1(1977), No. 6, 209-214
• [10] Liu H., Sun L., Shi Z., Dual-bandgap characteristics of spurline filters and its circuit modeling. Microwave and Optical Technology Letters, 49(2007), No. 11, 2805-2807
• [11] Taflove A., Hagness S., Computational Electrodynamics: The Finite-Difference Time-Domain Method. 3rd ed. Artech House, Inc., 2005
• [12] Liu H., Knoechel R.H., Schuenemann K.F., Miniaturized bandstop filter using meander spurline and capacitively loaded stubs. ETRI Journal, 29(2007), No. 5, 614-618