Inherently non‐resonant multi‐band mobile terminal antenna

Abstract

An inherently non-resonant capacitive coupling element antenna for mobile handsets is presented. The compact antenna includes a simple coupling element with a novel multi-band matching circuit for simultaneous 698-960 and 1710-2690 MHz operation. Experimental results show that the antenna performs strongly in comparison to the current state-of-the-art in mobile terminal antennas, and that the non-resonant antenna is a competitive choice for mobile terminals.

Antenna Solutions for 4G Smartphones in Laser Direct Structuring Technology

“…In [3], a dual-CE configuration called ground plane boosters was proposed with the two MN branches being connected after using notch-filters in each branch. In [4], [5], antennas were proposed to enlarge the bandwidth coverage down to 700 MHz (low-LTE band). The antenna in [4] may operate in the low LTE and UMTS frequency bands (700-960 MHz and 1.7-2.2 GHz) utilizing a single CE.…”

“…The matching circuit at the feed con-sists of a two-branched MN for dual-band operation, having nine SMD components. In [5], the operating frequency was extended down to 700-960 MHz and up to 1.7-2.7 GHz, covering the 4G cellular communication bands. The antenna acts as a dual-feed structure where the LB feed uses the radiating element as a CE whereas the HB feed (having an offset in excitation point compared to the LB feed) is using also the resonant properties of the radiating element.…”

Effect of antenna bandwidth and placement on the robustness to user interaction

“…The LTE bands are situated in the frequency range between 700 MHz and 2.69 GHz. To cover all of these bands one can either make the antenna wide band (WB) and cover all frequencies of interest simultaneously with multi-resonant matching [2]- [4] or make the antenna tunable and adjust it for the frequencies of interest [5]- [7]. By making the antenna tunable, the bandwidth requirement is significantly reduced meaning that a smaller element can be used.…”

A Compact Multiband Internal Antenna for 4G Mobile Terminals on a Support

“…The miniaturization of internal antenna for the mobile devices is also an inevitable trend. And in the decades, a large number of antenna designers have done plenty of researches [2][3][4][5]. But because of the quite long wavelength of LTE 700, the realization of the antenna small size is difficult, especially the operating frequency bands of the antenna are requested to cover all current 2G/3G/4G communication standard bands, such as LTE 700(698~787 MHz), GSM 850(824~ 894 MHz), GSM 900(880~960 MHz), DCS 1800(1710~ 1880 MHz), PCS 1900(1850~1990 MHz, UMTS(1920~ 2170 MHz), LTE 2300(2300~2400 MHz) and LTE 2500 (2500~2690 MHz), it will be a greater challenge.…”