Small‐size 11‐band LTE/WWAN/WLAN internal mobile phone antenna

Abstract

program. Type-B uncertainty is evaluated through a Monte Carlo simulation program [5]. The uncertainties in T min at all frequencies are below 5.1%, and the uncertainties in |C opt | are below 5.8%. The fitted reduced gain is within 0.065 dB difference from the values measured on the VNA ($32.4 dB) at all three frequency points. These results are comparable to the previous VTU measurements [2]. 5. DISCUSSION AND CONCLUSIONS 7. A.M. Abbosh and M.E. Bialkowski, Design of compact directional couplers for UWB applications, IEEE Trans Microwave Theory Tech 55 (2007), 189-194. 8. K.T. Park, Y.H. Cho, and S.W. Yun, Low voltage tunable narrow bandpass filter using cross-coupled stepped-impedance resonator with active capacitance circuit, IEEE MTTS Int Microwave Symp Dig,ABSTRACT: This work presents an internal mobile phone antenna occupying a small board space of 600 mm 2 on the system circuit board and providing three wide operating bands of at least 698-960, 1710-2690, and 5150-5825 MHz for the 11-band long term evolution (LTE)/ wireless wide area network (WWAN)/wideband local area network (WLAN) operation. This includes three LTE bands of LTE700/2300/2500, five WWAN bands of GSM850/900/1800/1900/UMTS, and three WLAN 2.4/5.2/5.8 GHz bands. The antenna is a coupled-fed shorted monopole, with a wide feeding strip in the coupling feed, a long shorting strip closely coupled to the shorted monopole, and a tuning stub connected to the shorting strip. The antenna's three wide operating bands are achieved and controlled by tuning the width of the feeding strip, the gap between the shorting strip and the shorted monopole, and the dimensions of the tuning stub. Operating principle of the proposed antenna is described in detail in this article. Results of the fabricated antenna are presented and discussed. The specific absorption rate results of the antenna with the presence of the user's head and hand are also studied. Figure 4Fitted results of LNA T min and LNA |C opt | from five day VTU measurements. Error bars indicate the standard uncertainty (1r)ABSTRACT: A novel forward and backward periodic microstrip antenna is presented and tested in this article. The experimental results show that the main lobe scans electronically from 140 to 30 in y-z plane when the operating frequency increases from 3.2 to 8 GHz. The

Planar Monopole Antenna With Two Coupled Strips for Internal Eight-Band Lte/Wwan Laptop Computer Application

“…It has a two-sided structure that is composed of a bent driven strip and two coupled strips. Comparing to those designs [1][2][3][4][5][6][7][8][9][10][11][12][13] used in a portable device, the proposed antenna can achieve not only a multiband property but also a more compact size of 65(L) × 11(W)×0.4(H) mm 3 (0.286 cm 3 ). This will make the proposed antenna suitable for integration within a smaller laptop computer device such as ultrabook.…”

“…To this end, multiband antenna design to cover the WWAN bands (GSM850/900/1800/1900/UMTS) of 824-896/880-960/1710-1880/1850-1990/1920-2170 MHz and the LTE bands (LTE700/2300/2500) of 698-787/2305-2400/2500-2690 MHz have become a promising technology. Regarding the design condition of a mobile phone, several multiband antennas capable of achieving LTE/WWAN operation have been investigated in [1][2][3][4][5][6]. By utilizing a coupled feed structure and an inductive shorting strip, three planar monopole antennas [1][2][3] could generate a good multiband property for LTE and WWAN applications in a mobile handset.…”

“…Moreover, the use of a meander shape was an effective way to further reduce the antenna's size. Thus three compact designs [4][5][6] could function as an internal antenna for a small handset device.…”

“…For a low-profile laptop computer application, a compact inverted-F antenna working with multiple branch strips to create multiband property has been recently proposed in [13]. According to those previous studies shown in [1][2][3][4][5][6][7][8][9][10][11][12][13], a smaller size and multiband operation were two critical design challenges for an internal LTE/WWAN antenna in a portable device.…”

Antenna Solutions for 4G Smartphones in Laser Direct Structuring Technology

“…In this kind of antennas, the LB coverage is mainly achieved by the capacitive excitation of the parasitic element and the HB is covered using the driven monopole and the higher order resonances of the parasitic strip. The antennas presented in [8][9][10][11] use the same strategy to obtain 4G LTE coverage in mobile terminal antennas, taking into account also a dielectric casing with loss tangents varying between 0.01-0.02. Due to dielectric loading effect and losses, the casing makes it easier for the antenna to operate down to 700 MHz especially shifting its resonance to lower frequencies.…”