Ultrathin planar inverted‐F antenna for multistandard handsets

Abstract

and the slope efficiency is 8.5% in a true single-frequency spectrum at the maximum pump power. The beam quality factor M 2 was found to be Ͻ1.3, and the polarization remains linear over the whole power range. REFERENCES

Bandwidth enhancement of coupled‐fed on‐board printed PIFA using bypass radiating strip for eight‐band LTE/WWAN slim mobile phone

“…The internal antennas that can be directly printed on the system circuit board are easy to fabricate at low cost; moreover, as such on-board printed internal antennas show negligible thickness above the circuit board, they are very suitable for slim mobile phone applications [1][2][3][4][5]. Promising on-board printed antennas with a small printed area on the system circuit board for WWAN (wireless wide area network) operation covering the GSM850/900 bands (824-960 MHz) and GSM1800/1900/UMTS bands (1710-2170 MHz) in the mobile phone have also been reported very recently [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Small‐size coupled‐fed shorted T‐monopole for internal WWAN antenna in the thin‐profile mobile phone

“…Different from the conventional patch PIFAs [1][2][3][4][5], the wideband internal antennas can be obtained by removing the ground plane below the radiating portion of the antenna [6,8] or printing the antenna directly on the no-ground portion of the system circuit board of the mobile phone [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The antennas in the former case [6,8] still show a 3D structure and their fabrication cannot be simplified.…”

“…The antennas in the former case [6,8] still show a 3D structure and their fabrication cannot be simplified. For the latter case, they generally show no thickness above the circuit board of the mobile phone and can be easily fabricated at low cost, making the internal printed antennas very good candidates for thin-profile mobile phone applications.…”

“…Coplanar waveguides (CPWs) and multilayered CPWs have received great attention due to their attractive features over the conventional microstrip lines in designing and manufacturing microwave integrated circuits (MICs) [1][2][3][4][5][6][7][8][9][10][11][12][13]. The advantages of CPWs are low dispersion, high flexibility in the design of…”

Small‐size wideband monopole antenna closely coupled with a chip‐inductor–loaded shorted strip for 11‐band WWAN/WLAN/WiMAX operation in the slim mobile phone

“…It has been a continuous challenge in the design of wideband or multiband internal antennas with the attractive features of small size, simple structure, and easy fabrication for the mobile phone applications. In addition, for applications in the modern slim mobile phone, the applied internal antennas should also be of thin thickness, which is generally required to be less than ∼3 mm [1–5]. To achieve small size, easy fabrication, and wideband operation, the on‐board printed internal antennas such as the printed inverted‐F antennas or shorted monopole antennas using a coupling feed for five‐band WWAN operation [6–10] are attractive for the modern slim mobile phone applications.…”