Year: 2025
Type: article
Abstract: As integrated electronic microsystems advance, their internal components demonstrate increasing miniaturization, higher-density integration, and, consequently, significantly enhanced performance. This paper presents an on-chip transformer balun. The balun has a combination of planar coupled inductors and filtering capacitors using integrated passive device (IPD) technology, giving it the advantages of a more compact circuit size and lower cost to achieve single-ended to differential function on glass substrates. Moreover, it can be integrated in systems by flip-chip. The die has a size of 1.81 mm × 1.36 mm with a -15 dB single-ended return loss bandwidth of 2.07 GHz to 4.30 GHz. Within this bandwidth, the maximum insertion loss is 2.56 dB, and the amplitude imbalance is less than 2.04 dB. The phase difference between the differential signals is 180 ± 14.02° and the common mode rejection ratio (CMRR) is above 19.08 dB. The balun has the potential of miniaturization for integration on package or through-glass interposers (TGIs).
Source: Micromachines
DOI: 10.3390/mi16040443
Authors: Jiang Qian, Peng Wu, Haiyang Quan, Wei Wang, Yong Wang, Shanshan Sun, Jingchao Xia
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,534
OpenAlex ID: W4409296551