Meander antenna with backside tuning stubs

• Published in: IEEE transactions on antennas and propagation Vol. 53; no. 4; pp. 1274 - 1277
• Main Authors: CHANG, The-Nan, KUO, Chao-Chiang
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.04.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Applied sciences; Bandwidth; Broadcasting. Videocommunications. Audiovisual; Coupling circuits; Digital audio broadcasting; Dipole antennas; Exact sciences and technology; Helical antennas; Joining; Meander antenna; Meanders; Noise levels; Passband; Printed circuits; Radio broadcasting; Radiocommunications; Resonance; Resonant frequency; resonator; Resonators; Sound broadcasting; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Tuning; wide bandwidth; Resonator; Meander antenna; tuning; Return loss; Printed circuit board; Digital audio broadcasting; Digital transmission; Experimental design; Resonance frequency; wide bandwidth; Current density; Multiple frequency; Antenna
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2005.844448

In this paper, we discuss a kind of meander antenna which is designed for digital audio broadcasting (DAB) reception in BAND-III upper band (210-240 MHz). Three resonators in addition to a driven element were constructed on the topside of a printed circuit board. On the backside of it, several coupling stubs were introduced to tune resonant frequencies to the required pass-band. Resonators with different lengths are resonated at different frequencies and these multiple resonances are responsible for an enhancement in bandwidth. With the help of backside coupling, it is easy to tune multiple frequencies to the required pass-band. It is also found that current density of the associated elements is increased by backside coupling. According to experimental results, the designed antenna reaches a bandwidth around 13.3% (return loss >10 dB) in the range of 210-240 MHz.