TY - GEN
T1 - T-ray Photoconductive Antenna Design for Biomedical Imaging Applications
AU - Han, Ruobin
AU - Abohmra, Abdoalbaset
AU - Nourinovin, Shohreh
AU - Abbas, Hasan
AU - Ponciano, Joao
AU - Shi, Lingfeng
AU - Alomainy, Akram
AU - Imran, Muhammad
AU - Abbasi, Qammer H.
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Photoconductive antennas are promising sources of terahertz (THz) radiation, which is frequently used to investigate and analyze biological organisms. These compact antennas make it possible to generate ultra-broadband pulses and continuously tunable THz transmissions at room temperature without the need for high-power laser sources. Here, a high efficiency spiral THz photoconductive antenna (PCA) is proposed. The design consists of a gallium arsenide (GaAs) substrate and a silicon (Si) hyper hemispherical lens. The proposed design has a radiation efficiency of up to 92.4% between 2.5 and 3.4 THz, with a directivity up to 17.6 dBi. With several current PCA designs as references, comparisons and analyses are made, indicating that the proposed work shows higher efficiency and radiation directivity at a wider band. The design of electrodes and hyper hemispherical lens are demonstrated in the paper. Simulations of contrast designs are shown as well, illustrating a 25%-40% efficiency and 12.8 dB gain increase by this design. Due to its performance and small structure, this antenna is ideal for T-ray medical imaging.
AB - Photoconductive antennas are promising sources of terahertz (THz) radiation, which is frequently used to investigate and analyze biological organisms. These compact antennas make it possible to generate ultra-broadband pulses and continuously tunable THz transmissions at room temperature without the need for high-power laser sources. Here, a high efficiency spiral THz photoconductive antenna (PCA) is proposed. The design consists of a gallium arsenide (GaAs) substrate and a silicon (Si) hyper hemispherical lens. The proposed design has a radiation efficiency of up to 92.4% between 2.5 and 3.4 THz, with a directivity up to 17.6 dBi. With several current PCA designs as references, comparisons and analyses are made, indicating that the proposed work shows higher efficiency and radiation directivity at a wider band. The design of electrodes and hyper hemispherical lens are demonstrated in the paper. Simulations of contrast designs are shown as well, illustrating a 25%-40% efficiency and 12.8 dB gain increase by this design. Due to its performance and small structure, this antenna is ideal for T-ray medical imaging.
KW - Antenna lens
KW - Photoconductive antenna
KW - Spiral antenna
KW - Terahertz
UR - https://www.scopus.com/pages/publications/85151684326
U2 - 10.1109/IMAS55807.2023.10066897
DO - 10.1109/IMAS55807.2023.10066897
M3 - Conference contribution
AN - SCOPUS:85151684326
T3 - 2023 International Microwave and Antenna Symposium, IMAS 2023
SP - 195
EP - 198
BT - 2023 International Microwave and Antenna Symposium, IMAS 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 1st International Microwave and Antenna Symposium, IMAS 2023
Y2 - 7 February 2023 through 9 February 2023
ER -