Small-Size Octaband Monopole Antenna in an LTE/WWAN Mobile Phone

This letter proposes a small-size printed antenna with multiband WWAN/LTE operation in a mobile phone by introducing a novel loop parasitic shorted strip and a C-shaped ground plane. The obtained impedance bandwidths across LTE and WWAN operating bands approach 277 and 1176 MHz, respectively. The proposed printed monopole antenna reduces the antenna size by at least 22% since the overall antenna size is only 35 × 10 × 0.8 mm3. The measured peak gains and antenna efficiencies are approximately 2.2/3.1 dBi and 76%/82% for the LTE/WWAN bands, respectively.

[1]  Kin-Lu Wong,et al.  Internal penta-band printed loop-type mobile phone antenna , 2007, TENCON 2007 - 2007 IEEE Region 10 Conference.

[2]  Kin-Lu Wong,et al.  Internal multiband printed folded slot antenna for mobile phone application , 2007 .

[3]  Kin-Lu Wong,et al.  Quarter-Wavelength Printed Loop Antenna With an Internal Printed Matching Circuit for GSM/ DCS/PCS/UMTS Operation in the Mobile Phone , 2009, IEEE Transactions on Antennas and Propagation.

[4]  Kin-Lu Wong,et al.  Printed $\lambda/8$ -PIFA for Penta-Band WWAN Operation in the Mobile Phone , 2009, IEEE Transactions on Antennas and Propagation.

[5]  Cheng-Tse Lee,et al.  Planar Monopole With a Coupling Feed and an Inductive Shorting Strip for LTE/GSM/UMTS Operation in the Mobile Phone , 2010, IEEE Transactions on Antennas and Propagation.

[6]  Kin-Lu Wong,et al.  Small‐size coupled‐fed shorted T‐monopole for internal WWAN antenna in the thin‐profile mobile phone , 2010 .

[7]  Kin-Lu Wong,et al.  Study of a hearing aid-compatible internal LTE/WWAN bar-type mobile phone antenna , 2010, 2010 Asia-Pacific Microwave Conference.

[8]  Kin‐Lu Wong,et al.  Planar Printed Strip Monopole With a Closely-Coupled Parasitic Shorted Strip for Eight-Band LTE/GSM/UMTS Mobile Phone , 2010, IEEE Transactions on Antennas and Propagation.

[9]  Wei-Yu Li,et al.  Small‐size coupled‐fed printed PIFA for internal eight‐band LTE/GSM/UMTS mobile phone antenna , 2010 .

[10]  Kin-Lu Wong,et al.  Small‐size printed loop‐type antenna integrated with two stacked coupled‐fed shorted strip monopoles for eight‐band LTE/GSM/UMTS operation in the mobile phone , 2010 .

[11]  Jia-Yi Sze,et al.  A COMPACT PLANAR HEXA-BAND INTERNAL ANTENNA FOR MOBILE PHONE , 2010 .

[12]  Ding-Bing Lin,et al.  INTERDIGITAL CAPACITOR IFA FOR MULTIBAND OPERATION IN THE MOBILE PHONE , 2010 .

[13]  Kin‐Lu Wong,et al.  On-Board Printed Coupled-Fed Loop Antenna in Close Proximity to the Surrounding Ground Plane for Penta-Band WWAN Mobile Phone , 2011, IEEE Transactions on Antennas and Propagation.

[14]  Kin-Lu Wong,et al.  On-board small-size printed LTE/WWAN mobile handset antenna closely integrated with system ground plane , 2011 .

[15]  Hsien-Wen Liu,et al.  DESIGN OF PLANAR COUPLED-FED MONOPOLE ANTENNA FOR EIGHT-BAND LTE/WWAN MOBILE HANDSET APPLICATION , 2012 .

[16]  Yong-Ling Ban,et al.  BANDWIDTH ENHANCEMENT OF LTE/WWAN PRINTED MOBILE PHONE ANTENNA USING SLOTTED GROUND STRUCTURE , 2012 .

[17]  Jui-Han Lu,et al.  Internal Uniplanar Antenna for LTE/GSM/UMTS Operation in a Tablet Computer , 2013, IEEE Transactions on Antennas and Propagation.

[18]  Yong-Ling Ban,et al.  Low-Profile Printed Octa-Band LTE/WWAN Mobile Phone Antenna Using Embedded Parallel Resonant Structure , 2013, IEEE Transactions on Antennas and Propagation.

[19]  Jinhong Guo,et al.  Small-Size Coupled-Fed Antenna With Two Printed Distributed Inductors for Seven-Band WWAN/LTE Mobile Handset , 2013, IEEE Transactions on Antennas and Propagation.

[20]  Jui-Han Lu,et al.  Planar Compact LTE/WWAN Monopole Antenna for Tablet Computer Application , 2013, IEEE Antennas and Wireless Propagation Letters.

[21]  Jui-Han Lu,et al.  Planar Internal LTE/WWAN Monopole Antenna for Tablet Computer Application , 2013, IEEE Transactions on Antennas and Propagation.

[22]  Rui Li,et al.  Small-Size Wideband Monopole With Distributed Inductive Strip for Seven-Band WWAN/LTE Mobile Phone , 2013, IEEE Antennas and Wireless Propagation Letters.