Propagation comparisons at VHF and UHF frequencies
- Resource Type
- Conference
- Authors
- Xiaohu Zhang; Burress, Thomas Weston; Albers, Keith B.; Kuhn, William B.
- Source
- 2009 IEEE Radio and Wireless Symposium Radio and Wireless Symposium, 2009. RWS '09. IEEE. :244-247 Jan, 2009
- Subject
- Fields, Waves and Electromagnetics
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Communication, Networking and Broadcast Technologies
UHF propagation
Antenna measurements
Antennas and propagation
VHF circuits
Dipole antennas
Frequency measurement
Radio transmitters
Transmitting antennas
UHF circuits
Radiofrequency integrated circuits
Radio
propagation
path loss
transmitter circuit
antenna
UHF
VHF
- Language
- ISSN
- 2164-2958
2164-2974
This paper presents and compares measured propagation data taken at four unlicensed-band frequencies including 151MHz, 433MHz, 902MHz and 2400MHz. A custom 10mW signal source was used as the transmitter, and a spectrum analyzer as the receiver to provide accuracy to within 1dB and sensitivity to better than −120 dBm. Both monopole and low-gain directional antennas were employed to represent expected use in an Energy Harvesting application. The measurement environment included both indoor and outdoor features. A range of up to 1.5km at the lower frequencies was achieved. The path-loss exponent was found to be approximately three to five and relatively independent of the operating band. Results confirm that lower frequencies are preferred for low-power applications when omni-directional and low gain antennas are used.