volume | PIER Journals

Abstract

This paper presents compact on-chip finite ground coplanar waveguide (FGCPW) lowpass filter (LPF) and bandpass filter (BPF) for V-band multi gigabit per second (Gbps) wireless personal area network (WPAN) applications. The equivalent lumped-element circuit of the proposed filters can be represented by an ABCD matrix which is obtained by consecutively multiplied ABCD matrixes of one T-network impedance and two shunt admittances. The full-wave EM simulators, Ansoft^TM HFSS and Agilent^TM Momentum, were used to fine tune the desired frequency response. The FGCPW LPF and BPF were implemented in WIN^TM semiconductor 0.15 μm pHEMT process. The obtained insertion losses are smaller than 0.5 dB and 1.5 dB with return losses of better than 20 dB and 13 dB, respectively. The 1-dB bandwidths of the LPF and BPF are 70 GHz (0-70 GHz) and 11 GHz (55-66 GHz), respectively. The stopband rejections are better than 20 dB from 95 to 120 GHz in the LPF, and from 0 to 42 GHz and 82 to 120 GHz in the BPF. The measured frequency responses show good agreements with the simulations. The chip size is very compact of 0.43×0.45 mm².

1. Smulders, P., "Exploring the 60 GHz band for local wireless multimedia access: Prospects and future directions," IEEE Commun. Mag., Vol. 40, No. 1, 140-147, Jan. 2002.
doi:10.1109/35.978061 Google Scholar

2. Wu, M.-S., Y.-Z. Chueh, J.-C. Yeh, and S.-G. Mao, "Synthesis of triple-band and quad-band bandpass filters using lumped-element coplanar waveguide resonators," Progress In Electromagnetics Research B, Vol. 13, 433-451, 2009.
doi:10.2528/PIERB09021302 Google Scholar

3. Chen, M., Y.-C. Lin, and M.-H. Ho, "Quasi-lumped design of bandpass filter using combined cpw and microstrip," Progress In Electromagnetics Research Letters, Vol. 9, 59-66, 2009.
doi:10.2528/PIERL09042201 Google Scholar

4. Ismail, A., M. S. Razalli, M. A. Mahdi, R. S. A. R. Abdullah, N. K. Noordin, and M. F. A. Rasid, "X-band trisection substrate-integrated waveguide quasi-elliptic filter," Progress In Electromagnetics Research, Vol. 88, 133-145, 2008.
doi:10.2528/PIER08081802 Google Scholar

5. Zhang, J. and T. Y. Hsiang, "Dispersion characteristics of coplanar waveguides at subterahertz frequencies," Journal of Electromagnetic Waves and Application, Vol. 20, No. 10, 1411-1417, 2006.
doi:10.1163/156939306779276767 Google Scholar

6. Wang, J.-P., B.-Z. Wang, and W. Shao, "A novel partly shielded finite ground CPW low pass filter," Journal of Electromagnetic Waves and Application, Vol. 19, No. 5, 689-696, 2005.
doi:10.1163/1569393053305053 Google Scholar

7. Yang, B., E. Skafidas, and R. J. Evans, "Design of 60 GHz millimetre-wave bandpass filter on bulk CMOS," IET Trans. Microwaves, Antennas and Propagat., Vol. 3, No. 6, 943-949, Sep. 2009.
doi:10.1049/iet-map.2008.0222 Google Scholar

8. Hsu, C.-Y., C.-Y. Chen, and H.-R. Chuang, "A 60-GHz millimeter-wave bandpass filter using 0.18-¹m CMOS technology," IEEE Electron Device Lett., Vol. 29, No. 3, 246-248, Mar. 2008.
doi:10.1109/LED.2007.915369 Google Scholar

9. Lee, Y.-C., W.-I. Chang, and C.-S. Park, "Monolithic LTCC SiP transmitter for 60GHz wireless communication terminals," IEEE MTT-S Int. Microwave Symp. Dig., 1015-1018, Jun. 2005. Google Scholar

10. Lee, M.-G., T.-S. Yun, K.-B. Kim, D.-H. Shin, T.-J. Baet, and J.-C. Lee, "Design of millimeter-wave bandpass filters with λ_g/4 short stubs using GaAs surface micromachining," European Int. Microwave Conf. Dig., Vol. 2, Oct. 4-6, 2005. Google Scholar

11. Ali, W. K. W. and S. H. AI-Charchafchi, "Using equivalent dielectric constant to simplify the analysis of patch microstrip antenna with multi layer substrates," Proc. IEEE AP-S Int. Symp., Vol. 2, 676-679, Jun. 1998. Google Scholar

12. Hettak, K., N. Dib, A. F. Sheta, and S. Toutain, "A class of novel uniplanar series resonators and their implementation in original applications," IEEE Trans. Microw. Theory Tech., Vol. 46, No. 9, 1270-1276, Sep. 1998.
doi:10.1109/22.709469 Google Scholar

13. Hettak, K., N. Dib, A. Omar, G. Y. Delisle, M. Stubbs, and S. Toutain, "A useful new class of miniature CPW shunt stubs and its impact on millimeter-wave integrated circuits ," IEEE Trans. Microw. Theory Tech., Vol. 47, No. 12, 2340-2349, Dec. 1999.
doi:10.1109/22.808980 Google Scholar

14. Simons, R. N., Coplanar Waveguide Circuits Components and Systems , Wiley-Interscience, 2001.

15. Godshalk, E. M., "Generation and observation of surface waves on dielectric slabs and coplanar structures," IEEE MTT-S Int. Microwave Symp. Dig., 923-926, 1993.

16. Tsuji, M., H. Shigesawa, and A. A. Oliner, "New surface-wave-like mode on CPWs of infinite width and its role in explaining the leakage cancellation effect," IEEE MTT-S Int. Microwave Symp. Dig., 495-498, 1992. Google Scholar

Prof. Hwann-Kaeo Chiou

Dr. I-Shan Chen