V. A. Kaloshin - Dr.Sc. (Phys.-Math.), Head of Laboratory of Kotelnikov IRE RAS; Professor of Moscow Institute of Physics and Technology. E-mail: vak@cplire.ru Q. Z. Nguyen - Post-graduate Student, Moscow Institute of Physics and Technology. E-mail: duynq.aic@gmail.com

The numerical simulation, optimizing and investigation of matching and radiation characteristics of collinear antenna arrays forming an omnidirectional pattern in the horizontal plane in the frequency band 3-6 GHz have been conducted with using the finite element method. Collinear antenna arrays consist of the power divider and symmetric cylinder-biconical or polyconic elements working away from the ground, or with one asymmetric element working near the ground. The two-port and three-port power dividers for antenna arrays based on the coaxial line have been designed. It has been shown, that an asymmetric element reduces the effect of the ground on matching and radiation characteristics of two-element antenna arrays and on matching characteristic of three-element antenna array only. Three-element array compared with two-element arrays provides narrower impedance matching bandwidth, but higher gain and more stable radiation pattern at high frequencies.

 

1. Kaloshin V.A., Martynov E.S., Skorodumova E.A.Modelirovanie bikonicheskojj antenny v shirokojj polose chastot // Sb. trudov III Vseros. konf. «Radiolokacijairadiosvjaz». M.: IREHim. V.A. KotelnikovaRAN. 2009. S. 97-101.
2. Ott T., Eibert T.F. A 433 MHz-22 GHz reconfigurable dielectric loaded biconical antenna // 4-th IEEE European Conf. on Antennas and Propagation (EuCAP 2010). Spain. April 2010. P. 1-5.
3. McDonald J.L., Filipovic D.S. Biconical antenna over ground plane // IEEE Trans. on Antennas and Propagation. April 2012. V. 60. № 4. P. 2093-2096.
4. Amert A.K., Whites K.W. Miniaturization of the biconical antenna for ultrawideband applications // IEEE Trans. on Antennas and Propagation. 2009. V. 57. № 12. P. 3728-3735.
5. Mulenga C.B., Flint J.A. Radiation characteristics of a conical monopole antenna with a partially corrugated ground plane // Antennas and Propagation Conf. (LAPC 2009). Loughborough. 2009. P. 517-520.
6. McDonald J.L., Filipovic D.S.A monocone - bicone collinear array // IEEE Trans. on Antennas and Propagation. 2010. V. 58. № 12. P. 3905-3912.
7. Vinogradov A.D., Mikhin A.JU., Podshivalova G.V. Struktury i kharakteristiki osesimmetrichnykh shirokodiapazonnykh antenn pelengatornykh antennykh reshetok OVCH-UKV diapazonov // Antenny. 2015. № 5. S. 4-27.
8. Kaloshin V.A., Martynov E.S., Skorodumova E.A. Issledovanie kharakteristik polikonicheskojj antenny v shirokojj polose chastot // Radiotekhnika i ehlektronika. 2011. T. 56. № 9. S. 1094-1098.
9. Kaloshin V.A., Nguen K.Z. Issledovanie sverkhshirokopolosnojj antennojj reshetki iz cilindro-bikonicheskikh i polikonicheskikh ehlementov // Sb. trudov II Vseros. mikrovolnojj konf. M.: IREH im. V.A. Kotelnikova RAN. 2014. S. 514-518.