Abstract
Radiation in the display direction of the 5G millimeter-wave (mm-wave) antenna in mobile phones is challenging due to the obstruction from the display. In this article, a shared aperture 4G LTE and 5G mm-wave antenna in mobile phones with enhanced mm-wave radiation in the display direction is studied. The 5G mm-wave array, consisting of four slot elements, is constructed in the clearance of a 4G LTE antenna. For the shared aperture design, the interdigital coupling (IDC) structure, which has a slight effect on the 4G LTE antenna, is used as the ground of the slot element. To enhance the mm-wave radiation in the display direction, two groups of floating patches are applied. For the 4G LTE antenna, the measured -6 dB impedance bandwidths are 280 MHz (700-980 MHz) and 1220 MHz (1700-2920 MHz). The measured efficiency is higher than 40%. For the 5G mm-wave array, the measured overlapped -10 dB impedance bandwidth is 2.7 GHz (25.1-27.8 GHz). The measured mutual coupling among each element is lower than -16 dB. Within the 25.5-27.5 GHz, in the display direction, the measured peak gain is 10.4 dBi, and the 3 dB beam steering range reaches 90° (45°-135°) with a gain higher than 7.5 dBi.
| Original language | English |
|---|---|
| Pages (from-to) | 4772-4782 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 71 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jun 2023 |
| Externally published | Yes |
Keywords
- 4G LTE antenna
- 5G millimeter-wave (mm-wave) array
- beam steering
- mobile phones
- shared aperture