Radiotekhnika
Publishing house Radiotekhnika

"Publishing house Radiotekhnika":
scientific and technical literature.
Books and journals of publishing houses: IPRZHR, RS-PRESS, SCIENCE-PRESS


Тел.: +7 (495) 625-9241

 

Determination of location of coaxial probe due to effective feed of circular microstrip antenna

Keywords:

V.N. Mitrokhin – Dr. Sc. (Eng.), Professor of Bauman Moscow State University, Senior Research Worker at Bauman Moscow State University Research Institute
N. Yu. Fadeeva  Post-graduate Student, Bauman Moscow State University, Junior Research Worker at Bauman Moscow State University Research Institute. E-mail: fadeeva.n.u@gmail.com


The paper describes the influence of effective feed location on circular microstrip radiator efficiency. The influence of effective feed location and antenna parameters on radiator and route match was studied. The location of offective feed of microstrip antenna is determined on the basis of results obtained within the process of research of radial line feed by coaxial probe[8]. Antenna may be analized with the help of resonant element (Fig. 1). Field components are determined through magnetic vector potential (7). Maximal values of polar pattern of circular printed antenna are studied according to location of coaxial probe. The result of the study shows that polar pattern maximum is reached within coaxial probe location kb=2,0 and coincides with coaxial probe location within effective feed of radial line (Fig. 2). Results are proved by finite elements method which is more unified as well as more expensive method from the point of view of resourses. It should be noted that suggested method allows to estimate polar pattern of the antenna but not the quality of its match with route. VSWR is calculated with the help of finite elements method. It is shown that VSWR does not reach its highest point in frequency bandwidth within antenna effective feed. (Fig. 3). It is also noted that the match becomes better when antenna size is enlarged. There is such a value for radiator radius for which minimal VSWR has maximal power radiated in the direction of normal (Fig. 5). Antenna size is important for wireless mobile gadgets, that is why it is important to compensate current reactivity of coaxial probe to reduce radiator radius.
References:

  1. Voskresenskij D.I., Ovchinnikova E.V., Shmachilin P.A. Bortovy'e czifrovy'e antenny'e reshetki i ix e'lementy' / Pod red. D.I. Voskresenskogo. M.: Radiotexnika. 2013. S. 208
  2. Los' V.F. Mikropoloskovy'e i die'lektricheskie rezona­torny'e antenny'. SAPR-modeli: metody' matematicheskogo modelirovaniya / Pod red. L.D. Baxraxa. M.: IPRZhR. 2002. S. 96
  3. Knyazev S.T., Panchenko B.A., Nechaev Ju.B. i dr. E'lektrodinamicheskij raschet xarakteristik izlucheniya poloskovy'x antenn. M.: Radio i svyaz'. 2002. S. 256
  4. Kumar Girish, Ray K.P. Broadband microstrip antennas: Artech House. Inc. 2003. P. 409
  5. Ustrojstva SVCh i antenny'. Proektirovanie faziro­vanny'x antenny'x reshetok / Pod red. D.I. Voskresenskogo.  M.: Radiotexnika. 2012. S. 744
  6. Balanis A. Antenna Theory: Analysis Design, Third Edition: John Wiley & Sons, Inc. 2005. P. 1117
  7. Panchenko B.A., Nefedov E.I. Mikropoloskovy'e antenny'.  M.: Radio i svyaz'. 1986.  S.144
  8. Mitroxin V.N., Fadeeva N.Ju. Model' linii peredachi dlya analiza krugloj mikropoloskovoj antenny' // Vest­nik MGTU im. N.E'. Baumana. Ser. «Priborostroe­nie». 2012. № 7. S. 145-157.
  9. Golubeva N.S., Mitroxin V.N. Osnovy' radioe'lektroniki sverxvy'sokix chastot: ucheb. posobie. 2-e izd. M.: Izd-vo MGTU im. N.E'. Baumana. 2008. S. 488
  10. Mitroxin V.N. E'lektrodinamicheskie xarakteristiki czilindricheskix napravlyaemy'x voln v sloisty'x SVCh-strukturax  //  Radiotexnika. 2002. № 8. S. 64-72.
  11. Mitroxin V.N. Issledovanie perexodny'x polej v neod­norodny'x SVCh-strukturax s kriticheskimi secheniyami // Radiotexnika. 1999. № 4. S. 86-91.
  12. Werner D.H. An Exact Integration Procedure for Vector Potentials of Thin Circular Loop Antennas // IEEE Transactions on Antennas and Prop. Feb. 1996. V. 44. № 2. R. 157-165.
  13. Vanshtejn A.A. E'lektromagnitny'e volny'. M.: Radio i svyaz'. 1988. S. 440

June 24, 2020
May 29, 2020

© Издательство «РАДИОТЕХНИКА», 2004-2017            Тел.: (495) 625-9241                   Designed by [SWAP]Studio