Veli Voipio

Antenna elements

A simple presentation of the antenna element research is given in [1]. A general lecture of the basics of adaptive antennas [2].
A solution for a wideband quarter-wave patch antenna, polarizations are quite merged [3].
A concept for a cylindrical array [4]. Later developed in [5] and [8].
Licentiate thesis, contains similar topics as in the previous publications containing also a preliminary study of mutual coupling between antennas [5].
A wideband patch antenna with good polarization separation for measurements and base station antennas [6]. A refinement of the study in [5]. Patent application made for the feed.
The study [7] shows that the FDTD program can be used to design antennas. The FDTD calculation gives useful results for the antenna impedance when the calculation grid is fine. A refinement of the study in [5].
A study of cylindrical antenna arrays [8]. A refinement of the study in [4] and [5].

 

Publications

[1] V. Voipio: “Dual Polarized Stacked Microstrip Patch Antenna for Channel Measurements”, Proceedings of the IRC Workshop 1997. Report IRC-5, October 1997, p. 51-52.

[2] V. Voipio “Adaptive Antennas”, Practical Aspects of Antennas in Mobile Telecommunications Systems, Merito Forum TU100041U-VII, 21 p., Helsinki, 1998

[3] V. Voipio, J.Ollikainen, P.Vainikainen “Quarter-wave Patch Antenna with 35% Bandwidth”, Proceedings of IEEE Antennas and Propagation Society International Symposium 1998, Atlanta, USA, June 21-26, 1998, pp. 790-793

[4] V. Voipio, P.Vainikainen, “Narrowbeam Cylindrical Antenna Array with Sparse Antenna Spacing”, Proceedings of the IEEE 48th Vehicular Technology conference 1998, Ottawa (VTC 98), 3 vols., May 18-21 1998, pp. 465-469

[5] V. Voipio, Wideband Patch Antenna Array Techniques for Mobile Communications, Licentiate thesis, Helsinki University of Technology, 23rd  November 1998, 109 pp.

[6] V. Voipio, J.Ollikainen, P.Vainikainen, “Half-wave Stacked Patch Antenna with Dielectric Feed”, Proceedings of IEEE Antennas and Propagation Society International Symposium 1999, Orlando, USA, July 11-16, 1999, pp. 2466-2470

[7] V. Voipio, P.Vainikainen, “FDTD Simulations in Antenna Impedance Calculation”, Proceedings of the IEEE Antennas and Propagation Society International Symposium 1999, Orlando, USA, July 11-16, 1999, pp. 614-617

[8] V. Voipio, A.Toropainen, P.Vainikainen, “Optimal Cylindrical Antenna Arrays”, (draft, being submitted to ISAP 2000 August 2000, Fukuoka Japan)