Small-Size Wideband Monopole With Distributed Inductive Strip for Seven-Band WWAN/LTE Mobile Phone

Combining antenna and ground plane tuning to efficiently cover Tv white spaces on handsets

“…This affects the currents on the antenna structure and can have a dramatic effect on the total efficiency due to the Equivalent Series Resistance (ESR) loss of the tuning component. It has been shown that loading the ground plane enables to lower its resonance frequency [5]- [9]. Moreover, decreasing the resonance frequency of the ground plane as the antenna is tuned down lowers the Q, thus leads to lower surface currents and to lower power dissipation.…”

Reconfigurable PIFA with a parasitic strip line for a hepta‐band WWAN/LTE mobile handset

“…Accordingly, many internal antennas have been studied for generating a wide operating bandwidth. The performances of previously reported antennas and proposed antenna are summarised in Table 1 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. To maintain their radiation performance, mobile handset antennas require electrical isolation from metal objects such as ground plane.…”

“…To maintain their radiation performance, mobile handset antennas require electrical isolation from metal objects such as ground plane. Thus, internal antennas generally have a great height [1][2][3][4][5][6] or ground clearance [7][8][9][10][11]. However, tall structures are not very promising for the thin mobile handset applications.…”

Planar small-size LTE/WWAN tablet computer antenna with eight-band operation

“…The various applications of several planar monopole antennas (MAs) developed for LTE/WWAN operations include tablet computers, [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] laptop computers [18][19][20], and mobile phones. [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] However, those presented antenna designs have the drawbacks in the larger antenna size [3][4][5][6][7][8][9][10] or insufficient operating bandwidth [11][12][13][14][15][16]…”