1. Andrisano, O., V. Tralli, and R. Verdone, "Millimeter waves for short-range multimedia communication systems," Proceedings of the IEEE, Vol. 86, No. 7, 1383-1401, 1998.
doi:10.1109/5.681369
2. Bakhtafrooz, A., A. Borji, D. Busuioc, and S. Safavi-Naeini, "Novel two-layer millimeter-wave slot array antennas based on substrate integrated waveguides ," Progress In Electromagnetics Research, Vol. 109, 475-491, 2010.
doi:10.2528/PIER10091706
3. Wang, Z., B. Zhao, Q. Lai, H. Zhong, R.-M. Xu, and W. Lin, "Design of novel millimeter-wave wideband bandpass filter based on three-line microstrip structure," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 5-6, 671-680, 2010.
doi:10.1163/156939310791036359
4. Wang, Z., Q. Lai, R.-M. Xu, B. Yan, W. Lin, and Y. Guo, "A millimeter-wave ultra-wideband four-way switch filter module based on novel three-line microstrip structure band-pass filters," Progress In Electromagnetics Research, Vol. 94, 297-309, 2009.
doi:10.2528/PIER09060501
5. Yang, X.-D., Y.-S. Li, and C.-Y. Liu, "A toothbrush-shaped patch antenna for millimeter-wave communication," Electromagnetic Waves and Applications, Vol. 23, No. 1, 31-37, 2009.
doi:10.1163/156939309787604634
6. Hung, C.-Y., M.-H. Weng, R.-Y. Yang, and H.-W. Wu, "Design of a compact CMOS bandpass filter for passive millimeter-wave imaging system application," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 17-18, 2323-2330, 2009.
doi:10.1163/156939309790416134
7. Zhang, Q.-L. and S. N. Khan, "Compact broadside coupled directional coupler based on coplanar CRLH waveguides," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 2-3, 267-277, 2009.
doi:10.1163/156939309787604418
8. Lopez-Berrocal, B., J. de-Oliva-Rubio, E. Marquez-Segura, A. Moscoso-Martir, I. Molina-Fernandez, and P. Uhlig, "High performance 1.8-18 GHz 10-dB low temperature co-fired ceramic directional coupler," Progress In Electromagnetics Research, Vol. 104, 99-112, 2010.
doi:10.2528/PIER10040704
9. Podell, A., "A high directivity microstrip coupler technique," G-MTT 1970 International Microwave Symposium, 33-36, May 11-14, 1970.
10. Kobayashi, M. and R. Terakado, "Method for equalizing phase velocities of coupled microstrip lines by using anisotropic substrate," IEEE Transactions on Microwave Theory and Techniques, Vol. 28, No. 7, 719-722, Jul.1980.
doi:10.1109/TMTT.1980.1130155
11. March, S. L., "Phase velocity compensation in parallel-coupled microstrip," MTT-S International Microwave Symposium Digest, Vol. 82, No. 1, 410-412, Jun. 15-17, 1982.
12. Spielman, B. E., "The development of a 20 dB directional coupler for MIC applications," MTT-G International Microwave Symposium Digest, 186-188, Jun. 4-6, 1973.
13. Sheleg, B. and B. E. Spielman, "Broad band directional couplers using microstrip with dielectric overlays," IEEE Transactions on Microwave Theory and Techniques, Vol. 22, No. 12, 1216-1219, Dec. 1974.
doi:10.1109/TMTT.1974.1128466
14. Paolino, D. D., "MIC overlay coupler design using spectral domain techniques," IEEE Transactions on Microwave Theory and Techniques, Vol. 26, No. 9, 646-649, Sep. 1978.
doi:10.1109/TMTT.1978.1129456
15. Levy, R., "Tables for asymmetric multi-element coupled-transmission-line directional couplers," IEEE Transactions on Microwave Theory and Techniques, Vol. 12, No. 3, 275-279, May 1964.
doi:10.1109/TMTT.1964.1125809
16. Pelaez-Perez, A. M., J. I. Alonso, P. Almorox-Gonzalez, and J. Gonzalez-Martin, "Ultrabroadband Wilkinson power divider in millimeter-wave band," Microwave Journal, Vol. 52, No. 11, 32-42, Nov. 2009.
17. Southwest Microwave website, [online] available: http://www.southwestmicrowave.com, .