Resonant frequency of equilateral triangular microstrip antenna with and without air gap

A tunable equilateral triangular microstrip patch (ETMP) antenna with a variable air gap between the substrate and the ground plane has been studied theoretically and experimentally. Calculated resonant frequencies for different air gap heights have been verified with measurements of a coax-fed antenna. The tunability of the antenna as a function of the air gap height is studied theoretically showing over 200% tunable range of an ETMP with 50 mm side length printed on a substrate with /spl epsiv//sub r/=10.5. The computed results for the antennas with zero air gap height are compared with a standard spectral domain moment method analysis supported by other previously reported experiments. Very close agreement is revealed in all comparisons.

[1]  Dervis Karaboga,et al.  Simple and accurate effective side length expression obtained by using a modified genetic algorithm for the resonant frequency of an equilateral triangular microstrip antenna , 1997 .

[2]  Debatosh Guha,et al.  Resonant frequency of circular microstrip antennas with and without air gaps , 2001 .

[3]  R. Waterhouse,et al.  Wideband aperture coupled stacked patch antenna using thick substrates , 1996 .

[4]  W. Kiranon,et al.  Simple and accurate formula for the resonant frequency of the equilateral triangular microstrip patch antenna , 1994 .

[5]  Kin-Lu Wong,et al.  Novel dual-frequency and broad-band designs of slot-loaded equilateral triangular microstrip antennas , 2000 .

[6]  J. S. Dahele,et al.  On the resonant frequencies of the triangular patch antenna , 1987 .

[7]  J. Helszajn,et al.  Planar Triangular Resonators with Magnetic Walls , 1978 .

[8]  Çiğdem Seçkin Gürel,et al.  New computation of the resonant frequency of a tunable equilateral triangular microstrip patch , 2000 .

[9]  J. Helszajn,et al.  Circulators Using Planar Triangular Resonators , 1979 .

[10]  K. Guney.  Comments on "On the resonant frequencies of microstrip antennas" , 1994 .

[11]  J. Murphy,et al.  Aperture efficiencies of large axisymmetric reflector antennas fed by conical horns , 1988 .

[12]  Kerim Guney,et al.  Resonant frequency of a triangular microstrip antenna , 1993 .

[13]  Xu Gang.  On the resonant frequencies of microstrip antennas , 1989 .

[14]  Kin-Lu Wong,et al.  A MODIFIED EQUILATERAL-TRIANGULAR-RING MICROSTRIP ANTENNA FOR CIRCULAR POLARIZATION , 1999 .

[15]  Kin-Lu Wong,et al.  Single-feed circularly polarized equilateral-triangular microstrip antenna with a tuning stub , 2000 .

[16]  R. Waterhouse.  Design of probe-fed stacked patches , 1999 .

[17]  Stuart A. Long,et al.  An improved formula for the resonant frequencies of the triangular microstrip patch antenna , 1988 .

[18]  Y. Lo,et al.  Theory and experiment on microstrip antennas , 1979 .

[19]  P. Mythili,et al.  Comments on "Simple and accurate formula for the resonant frequency of the equilateral triangular mi , 2000 .

[20]  David C. Chang,et al.  A geometrical theory for the resonant frequencies and Q -factors of some triangular microstrip patch antennas , 1983 .

[21]  A. K. Sharma,et al.  Analysis of Triangular Microstrip Resonators , 1982 .

[22]  J. S. Dahele,et al.  Circular-disk microstrip antenna with an air gap , 1984 .

[23]  Ingo Wolff,et al.  Rectangular and Circular Microstrip Disk Capacitors and Resonators , 1974 .

[24]  Robert Staraj,et al.  Comments on A new model for calculating the input impedance of coax-fed circular microstrip antenna , 1990 .

[25]  Asok De,et al.  Comments on "An improved formula for the resonant frequency of the triangular microstrip path antenna" [with reply] , 1991 .

[26]  L. J. Griffiths,et al.  A New Model for Calculating the Input Impedance of Coax-Fed Circular Microstrip Antennas with and Without Air Gaps , 1990 .

[27]  Yong-Woong Jang.  Characteristics of a large bandwidth rectangular microstrip-fed inserted triangular patch in a circular slot antenna , 2002 .

[28]  Kwai-Man Luk,et al.  Characteristics of the equilateral triangular patch antenna , 1988 .

[29]  Jean-Pierre Damiano,et al.  Study of multilayer microstrip antennas with radiating elements of various geometry , 1990 .

[30]  Wei Chen,et al.  Theoretical and experimental studies of the resonant frequencies of the equilateral triangular microstrip antenna , 1992 .

[31]  Hamid Reza Hassani,et al.  Analysis of triangular patch antennas including radome effects , 1992 .