General design approach of monopole and helix integrated antennas for radio apparatus

Abstract

A design approach of multiband and wideband antennas for radio communication devices is presented. The antenna is consisted of a monopole, a folded loop, and a helix. The fundamental behaviors of the single element and their combinations are analyzed to give desired bandwidths per the mutual coupling between elements. The ground plane dimension and the device thickness are considered. The study has a focus on the UHF and lower microwave range to support most of civilian applications. The presented antenna structure is a good starting point to be familiar with the multiband antenna design as the antenna can be configured to cover a wide frequency range to support cellular telephony, GPS, wireless local networking on so forth. A radio communications device incorporating such antennas is also described.

Design of Miniaturized Dual-Mode Antenna for Handset Terminal Communication

“…Furthermore, a comparison between the proposed antenna and the reference antennas is listed in Table 3. The antennas in [12,13] radiate linear polarization waves with endfire or approximate omnidirectional pattern, instead of circular polarization waves with upper half-space radiation pattern as needed in the satellite communication. The antenna in [18] works with circular polarization and upper half-space radiation pattern; however, the diameter of it is too large and the antenna gain at higher band is relatively low.…”

“…In [12], a wide band monopole antenna working at UHF clustered with two wide band dipole antennas working at L and S bands is proposed. [13] presents a design approach of a multiband and wideband antenna consisting of a monopole, a folded loop, and a helix. [14] presents a compact, dualpolarized, multiband four-port flexible MIMO antenna.…”