Abstract
This paper describes a technique for using twin element antennas (dipoles and slots) to increase the efficiency of antennas fabricated on electrically thick dielectric substrates. We present calculations which show that the efficiency of both the slot and dipole antennas can be increased by the proper spacing of elements placed broadside to each other. We consider the use of substrates that are odd integral multiples of a quarter of a dielectric wavelength thick and give results for an ε=4 substrate with thicknesses of one, three, and five quarter wavelengths. These thicknesses can be used when working at millimeter wave frequencies and yield substrate dimensions which can be handled and processed easily, while still yielding radiation-to-air efficiencies of about 70%. We also show calculated beam patterns for the elements which appear to be suitable for imaging array applications.
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References
D.B. Rutledge, D.P. Neikirk, and D.P. Kasilingam, ‘Integrated Circuit Antennas,’ Infrared and Millimeter Waves, vol. 10, Academic Press, 1983, pp. 1–90.
N.G. Alexopoulos, P.B. Katehi, and D.B. Rutledge, ‘Substrate Optimization for Integrated Circuit Antennas,’ IEEE Trans. Microwave Theory and Techniques, vol. MTT-31, no. 7, July, 1983, pp. 550–557.
I.E. Rana, and N.G. Alexopoulos, ‘Current Distribution and Input Impedance of Printed Dipoles,’ IEEE Trans. Antennas and Propagation, vol. AP-29, no. 1, Jan. 1981, pp. 99–105.
D.R. Jackson, and N.G. Alexopoulos, ‘Microstrip Dipoles on Electrically Thick Substrates,’ Infrared and Millimeter Waves, vol. 7, no. 1, 1986, pp. 1–26.
G.M. Rebeiz, W.G. Regehr, and D.B. Rutledge, ‘ Submillimeter-Wave Antennas on Thin Membranes,’ Infrared and Millimeter Waves, vol. 8, no. 10, Oct. 1987.
R.C. Compton, R. C. McPhedran, Zorana Popovic, G. M. Rebeiz, Peter Tong, and D. B. Rutledge ‘Bow-Tie Antennas on a Dielectric Half-Space: Theory and Experiment,’ IEEE Trans. Antennas and Propagation, vol. AP-35, no. 7, July 1987.
D. B. Rutledge, and M.S. Muha, ‘Imaging Antenna Arrays,’ IEEE Trans. Antennas and Propagation, vol. AP-30, no. 4, July 1982, pp 535–540.
D.M. Pozar, ‘Considerations for Millimeter Wave Printed Antennas,’ IEEE Trans. Antennas and Propagation, vol. AP-31, no. 5, Sept. 1983, pp 740–747.
D.M. Pozar, ‘Finite Phased Arrays of Printed Dipoles,’ IEEE Trans. Antennas and Propagation, vol. AP-33, No. 10, Oct. 1985, pp 1045–1053.
D.M. Pozar, ‘Finite Phased Arrays of Rectangular Microstrip Patches,’ IEEE Trans. Antennas and Propagation, vol. AP-34, no. 5, May 1986, pp. 658–665.
C. Zah, ‘Millimeter-Wave Monolithic Schottky Diode Imaging Arrays,’ PhD dissertation, California Institute of Technology, 1986.
R.L. Rogers, D.P. Neikirk, and H. Ling, ‘Planar Matching of Antennas on Electrically Thick Dielectric Substrates,’ Twelth International Conference on Infrared and Millimeter Waves, Dec., 1987, pp 288–289.
T. Itoh, ‘Spectral Domain Immitance Approach for Dispersion Characteristics of Generalized Printed Transmission Lines,’ IEEE Trans. Microwave Theory and Techniques, vol. MTT-28, no. 7, July, 1980, pp. 733–736
R.A. Harrington,Time Harmonic Electromagnetic Fields, McGraw Hill, New York, 1961.
Additional information
This work was supported by the Joint Services Electronics Program, program no. AFOSR-F49620-86-C0045, and the National Science Foundation under grant number ECS-8552868.
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Rogers, R.L., Neikirk, D.P. Use of broadside twin element antennas to increase efficiency on electrically thick dielectric substrates. Int J Infrared Milli Waves 9, 949–969 (1988). https://doi.org/10.1007/BF01010768
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DOI: https://doi.org/10.1007/BF01010768