DOI QR코드

DOI QR Code

중심주파수에서 원하는 위상변위가 가능한 대역통과 필터

A Bandpass Filter with a Desired Phase Shift at The Center Frequency

  • 투고 : 2012.05.23
  • 심사 : 2012.06.26
  • 발행 : 2012.07.01

초록

By cascading RHTL (Right-Handed Transmission Line) and LHTL (Left-Handed Transmission Line), we fabricated a BPF (Band Pass Filter) in which the phase propagation at the pass band center frequency is fixed as we want. We utilized a positive phase propagation of a RHTL which is a form of LPF (Low Pass Filter) and negative phase propagation of LHTL which is a form of HPF (High Pass Filter). Therefore, if RHTL and LHTL are cascaded, a BPF can be constructed and the phase propagation inside the passband is decided by the number of RHTLs and LHTLs. In this paper, we provide a detailed theory related to it and proved the theory with an actual experiment. In the experiment, we fabricated two BPFs with similar passband. One with $90^{\circ}$ phase shift and the other with $-90^{\circ}$ phase shift at the center of passband. The result of simulation and actual experiment agrees well. This proves the suggested theory is correct and feasible.

키워드

참고문헌

  1. Hongjoon Kim, Alexander B. Kozyrev, Abdolreza Karbassi and D. W. van der Weide, "Linear Tunable Phase Shifter Using a Left-Handed Transmission Line," IEEE Microwave Wireless Comp. Lett. Vol.15, no.5, pp. 366-368, May. 2005. https://doi.org/10.1109/LMWC.2005.847715
  2. C. Caloz, A. Sanada, and T. Itoh, "A novel composite right-/left-handed coupled-line directional coupler with arbitrary coupling level and broad bandwidth," IEEE Trans. Microwave Theory Tech., vol.52, no.3, pp. 980-992, March 2004. https://doi.org/10.1109/TMTT.2004.823579
  3. M. A. Antoniades and G. V. Eleftheriades, "Compact linear lead/lag metamaterial phase shifters for broadband applications," IEEE Antennas and Wireless Propagation Lett., vol.2, pp.103-106, 2003. https://doi.org/10.1109/LAWP.2003.815280
  4. A. B. Kozyrev, D. W. van der Weide, "Nonlinear Wave Propagation Phenomena in Left-Handed Transmission Line Media," IEEE Trans. on Microwave Theory and Tech ,vol.53, no.1, pp. 238-245, Jan. 2005. https://doi.org/10.1109/TMTT.2004.839305
  5. Hongjoon Kim, Sung-Jin Ho, Min-Ki Choi, Kozyrev, A.B, van der Weide, D.W, "Combined Left- and Right-Handed Tunable Transmission Lines With Tunable Passband and $0^{\circ}$ Phase Shift," Microwave Theory and Techniques, IEEE Trans. on , vol.54, no.12, pp.4178-4184, Dec. 2006. https://doi.org/10.1109/TMTT.2006.885884