Antennas utilized for intra-vehicle 3–11GHz and 55–65GHz channel measurement

In this work, antennas utilized for an intra-vehicle 3-11 GHz and 55-65 GHz channel measurement are described. A measurement antenna should not only provide a wide-band impedance bandwidth but also have a stable radiation pattern and a high fidelity factor. For the lower frequency band, a metal conical monopole antenna is proposed for its frequency stable H-plane omnidirectional radiation pattern. An open waveguide antenna (OWGA) and a substrate integrated waveguide slot antenna array are discussed for 55-65 GHz channel measurement. In the case of the OWGA, the effect of a flange on antenna properties is investigated. The suitability of these antennas for time domain measurement is discussed using fidelity factor. Both simulated and measured properties of the antennas are presented. The proposed antennas are also suitable for out-of-vehicle channel measurement. Most information about the channel measurement are freely available online: http://www.radio.feec.vutbr.cz/GACR-13-38735S/.