This letter introduces an impulse radio-ultrawideband (IR-UWB) angle-of-arrival (AoA) sensor integrated circuit (IC) using an auto-toggled time-to-digital converter (TDC). The detectable range of the proposed AoA sensor can be extended by a factor of 2 by utilizing an auto-toggle operation that toggles the TDC's input signal according to the target's position. The analog front end (AFE) of the receivers is designed with a 3-5 GHz band and the system comprises two AFEs and one digital back end (DBE). The proposed IR-UWB AoA sensor IC was fabricated using a 65-nm CMOS process. The measurable angular range was ± 40°, and an angle error of ± 1.5° was measured.
Bibliographical noteFunding Information:
The authors would like to thank the Staff of Rohde & Schwarz for the support of test instruments. The MPW and CAD tool was supported by IDEC.
Manuscript received August 1, 2019; revised September 17, 2019; accepted September 19, 2019. Date of publication October 14, 2019; date of current version November 6, 2019. This work was supported by the Institute of Information & Communications Technology Planning & Evaluation (IITP) grant funded by the Korean Government (MSIT) under Grant 2017-0-00418. (Corresponding author: Tae Wook Kim.) The authors are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea (e-mail: taewook.kim@ yonsei.ac.kr).
This work was supported by the Institute of Information & Communications Technology Planning & Evaluation (IITP) grant funded by the Korean Government (MSIT) under Grant 2017-0-00418.
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Electrical and Electronic Engineering