Title:
A linear high-efficiency millimeter-wave CMOS Doherty radiator leveraging on-antenna active load-modulation
A linear high-efficiency millimeter-wave CMOS Doherty radiator leveraging on-antenna active load-modulation
| dc.contributor.advisor | Wang, Hua | |
| dc.contributor.author | Nguyen, Huy Thong | |
| dc.contributor.committeeMember | Peterson, Andrew F. | |
| dc.contributor.committeeMember | Chang, Gee-Kung | |
| dc.contributor.department | Electrical and Computer Engineering | |
| dc.date.accessioned | 2019-05-29T14:04:33Z | |
| dc.date.available | 2019-05-29T14:04:33Z | |
| dc.date.created | 2019-05 | |
| dc.date.issued | 2019-04-30 | |
| dc.date.submitted | May 2019 | |
| dc.date.updated | 2019-05-29T14:04:33Z | |
| dc.description.abstract | This thesis presents a Doherty Radiator architecture that explores multi-feed antennas to achieve an on-antenna Doherty load modulation network and demonstrate high-speed high-efficiency transmission of wideband modulated signals. On the passive circuits, we exploit the multi-feed antenna concept to realize compact and high-efficiency on-antenna active load modulation for close-to-ideal Doherty operation, on-antenna power combining, and mm-Wave signal radiation. Moreover, we analyze the far-field transmission of the proposed Doherty Radiator and demonstrate its wide Field-of-View (FoV). On the active circuits, we employ a GHz-bandwidth adaptive biasing at the Doherty Auxiliary power amplifier (PA) path to enhance the Main/Auxiliary Doherty cooperation and appropriate turning-on/-off of the Auxiliary path. A proof-of-concept Doherty Radiator implemented in a 45nm CMOS SOI process over 62-68GHz exhibits a consistent 1.45-1.53× PAE enhancement at 6dB PBO over an idealistic class-B PA with the same PAE at P1dB. The measured Continuous-Wave (CW) performance at 65GHz demonstrates 19.4/19.2dBm PSAT/P1dB and achieves 27.5%/20.1% PAE at peak/6dB PBO, respectively. For single-carrier 1Gsym/s 64-QAM modulation, the Doherty Radiator shows average output power of 14.2dBm with an average 20.2% PAE and -26.7dB EVM without digital predistortion. Consistent EVMs are observed over the entire antenna FoV, demonstrating spatially undistorted transmission and constant Doherty PBO efficiency enhancement. | |
| dc.description.degree | M.S. | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | http://hdl.handle.net/1853/61298 | |
| dc.language.iso | en_US | |
| dc.publisher | Georgia Institute of Technology | |
| dc.subject | Doherty | |
| dc.subject | Power amplifier | |
| dc.subject | mm-Wave | |
| dc.title | A linear high-efficiency millimeter-wave CMOS Doherty radiator leveraging on-antenna active load-modulation | |
| dc.type | Text | |
| dc.type.genre | Thesis | |
| dspace.entity.type | Publication | |
| local.contributor.advisor | Wang, Hua | |
| local.contributor.corporatename | School of Electrical and Computer Engineering | |
| local.contributor.corporatename | College of Engineering | |
| relation.isAdvisorOfPublication | dce3ac41-daef-421b-975d-b0cbd27f9303 | |
| relation.isOrgUnitOfPublication | 5b7adef2-447c-4270-b9fc-846bd76f80f2 | |
| relation.isOrgUnitOfPublication | 7c022d60-21d5-497c-b552-95e489a06569 | |
| thesis.degree.level | Masters |