A Compact 48-63 GHz 3-dB Transformer-Based Quadrature Coupler with Arbitrary Transformer Coupling Coefficient in 22-nm CMOS FDSOI
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Date
2024-10
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Journal Article
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Abstract
This letter presents a novel 3-dB transformer-based quadrature coupler (TFQC) that is based on lumped inductors connected between the coupler ports. Compared to previously reported 3-dB TFQCs that strictly require a coupling coefficient ( k ) of 0.707, the proposed coupler can be designed with any arbitrary k for the transformer (TF), offering a much-expanded design space and scalability across frequency and different technologies. In addition, the required TF’s inductance of the proposed coupler is reduced compared to previous TFQC designs, allowing for a further size reduction. To validate the theory of the proposed coupler, a 48–63 GHz prototype is implemented in a 22-nm CMOS FDSOI technology, occupying an area of 0.017 mm 2 with an average insertion loss (IL) of 1.81 dB.
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published
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Journal / series
Volume
34 (10)
Pages / Article No.
1155 - 1157
Publisher
IEEE
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Software
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Date collected
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Subject
Compact coupler; hybrid coupler; on-chip coupler; quadrature coupler; transformer (TF)-based coupler
Organisational unit
09757 - Wang, Hua / Wang, Hua