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Journal Article
A 24 GHz ISM-Band Doppler Radar Antenna With High Isolation Characteristic for Moving Target Sensing Applications
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- Authors
- Sungpeel Kim, Dong Kyoo Kim, Youjin Kim, Jaehoon Choi, Kyung-Young Jung
- Issue Date
- 2019-07
- Citation
- IEEE Antennas and Wireless Propagation Letters, v.18, no.7, pp.1532-1536
- ISSN
- 1536-1225
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- A 24 GHz Industrial, Scientific, and Medical (ISM)-band Doppler radar antenna with high isolation is proposed for moving target sensing applications. Both transmit (Tx) and receive (Rx) antennas consist of 2 × 2 microstrip patch antenna arrays. High isolation of the proposed antenna is achieved by inserting periodic Jerusalem cross slot array between Tx port and Rx port, and thus the surface wave from Tx port to Rx port is significantly suppressed. The -10 dB reflection coefficient bandwidth of the proposed antenna is 510 MHz, and the isolation between Tx port and Rx port is higher than 36.7 dB over the 24 GHz ISM band. The simulated half-power beamwidths are 58.53째 for E-plane and 47.54째 for H-plane. Experimental results show that high isolation can lead to improve Doppler radar performance. The proposed antenna can be a good candidate for contact-free monitoring of the heart rate and respiration rate in healthcare applications.
- KSP Keywords
- 2.4 GHz, Doppler radar, E-Plane, H-Plane, Healthcare applications, Heart rate, ISM bands, Jerusalem cross, Microstrip Patch Antenna Arrays, Moving Target, Reflection Coefficient