1. A. V. Ashikhmin, Design and Optimization of Ultra-Wideband Antenna Devices and Systems for Radiomonitoring Facilities (Radio i svyaz’, Moscow, 2005) [in Russian].
2. N. A. Efimova and E. A. Skorodumova, in Technology of Information-Oriented Society (Proc. VII Branch Sci. Conf., Moscow, Feb. 20, 2013) (MTUSI, Moscow, 2013), p. 81.
3. J. A. G. Malherbe, in Proc. IEEE-APS Topical Conf. on Antennas and Propagation in Wireless Communications, Cape Town, South Africa, Sept. 2–7, 2012 (IEEE, New York, 2012), p. 1009.
4. V. L. Biryukov, N. A. Efimova, V. I. Kalinichev, et al., J. Radioelectron. (Electron. Resource), No. 1 (2013).
5. A. A. H. Ameri, G. Kompa, and A. Bangert, in Proc. 6th German Microwave Conf., Darmstadt, Germany, Mar. 14–16, 2011 (Darmstadt. Tech. Univ., Darmstadt, 2011), p. 1.