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- Hwann-Kaeo Chiou, Hsien-Jui Chen, Hsien-Yuan Liao, Shuw-Guann Lin, Yin-Cheng Chang
- Microelectronics Journal
- 2008

- Kuan-Hsiu Chien, Jian-Ying Chen, Hwann-Kaeo Chiou
- IEEE Transactions on Microwave Theory and…
- 2015

This paper presents divide-by-2 and divide-by-3 injection-locked frequency dividers (ILFDs) using a Darlington cell in a TSMC 0.18- μm CMOS process. The Darlington cell has higher transconductance than the traditional cross-coupled common source cell for free-running oscillator that reduces the power consumption of ILFDs. Besides, an LC resonance… (More)

- Hwann-Kaeo Chiou, Tsung-Yu Yang
- IEEE Transactions on Microwave Theory and…
- 2008

This study presents an asymmetric broadside coupled balun with low-loss broadband characteristics for mixer designs. The correlation between balun impedance and a 3D multilayer CMOS structure are discussed and analyzed. Two asymmetric multilayer meander coupled lines are adopted to implement the baluns. Three balanced mixers that comprise three miniature… (More)

- Hwann-Kaeo Chiou, Jui-Yi Lin
- IEEE Transactions on Microwave Theory and…
- 2011

This paper presents symmetric offset stack Marchand single and dual baluns that are designed, analyzed, and implemented in a 0.18-μm CMOS process to verify the feasibility. Both single and dual baluns achieve measured bandwidths (BWs) of over 110% and 90%, and insertion losses of less than 4.4 and 7.4 dB at 38 GHz. The amplitude imbalance and phase… (More)

- Kuei-Cheng Lin, Hwann-Kaeo Chiou, +4 authors Ying-Zong Juang
- IEEE Transactions on Microwave Theory and…
- 2013

A high-gain gate-pumped down-conversion mixer at 60 GHz is realized in a standard 90-nm CMOS process. The proposed mixer adopted a Darlington cell and a microstrip-line Lange coupler to yield wide 3-dB bandwidth from 5 to 65 GHz. The measured performance demonstrates a conversion gain (CG) of 6 dB at 4.2-mW power consumption. The maximum CG is 6.5 dB at 36… (More)

- Hwann-Kaeo Chiou, I-Shan Chen
- IEEE Transactions on Microwave Theory and…
- 2010

This paper proposes a high-efficiency dual-band on-chip rectifying antenna (rectenna) at 35 and 94 GHz for wireless power transmission. The rectenna is designed in slotline (SL) and finite-width ground coplanar waveguide (FGCPW) transmission lines in a CMOS 0.13-μm process. The rectenna comprises a high gain linear tapered slot antenna (LTSA), an… (More)

- Hwann-Kaeo Chiou, Kuei-Cheng Lin, Wei-Hsien Chen, Ying-Zong Juang
- IEEE Trans. on Circuits and Systems
- 2012

A 5 GHz double balanced mixer (DBM) is implemented in standard 90 nm CMOS low-power technology. A novel low-voltage self-bias current reuse technique is proposed in the RF transconductance stage to obtain better third-order intermodulation intercept point (IIP ) and conversion gain (CG) when considering the process variations. The DBM achieves a CG of 12… (More)

- Hwann-Kaeo Chiou, Hung-Ting Chou
- IEEE Transactions on Microwave Theory and…
- 2013

This paper proposes a microwatt source-driven down-conversion mixer with broadband asymmetrical broadside-coupled baluns in a 90-nm CMOS low-power process. The forward body biased (FBB) technique reduces the threshold voltage (V<sub>TH</sub>) and supply voltage for operation in the near weak inversion region in millimeter-wave mixer designs. To effectively… (More)

- Jui-Yi Lin, Hwann-Kaeo Chiou
- IEEE Trans. on Circuits and Systems
- 2011

This brief proposes a third-order active notch filter for an interferer-rejection (IR) ultrawideband low-noise amplifier (LNA) in a 0.18-μm complementary metal–oxide–semiconductor process. The design formulas are derived by considering the minimum power dissipation for the active notch filter that provides proper selections of the device size, the bias… (More)

- Tsung-Yu Yang, Hwann-Kaeo Chiou
- IEEE Radio Frequency Integrated Circuits (RFIC…
- 2006

A 28 GHz sub-harmonically pumped passive down conversion mixer fabricated in a 0.18-mum CMOS process is demonstrated. A low power fully differential LO frequency doubler is designed to generate at near half RF frequency. The proposed sub-harmonically pumped passive mixer has advantages in low power consumption, high fundamental frequency suppression, and… (More)