Abstract
Designs of hollow-core rectangular, circular, and elliptical waveguides with inner coating of silver and polystyrene (PS) are presented for low-loss terahertz guidance. The PS thickness deposited over silver is optimized to achieve the lowest possible loss for each waveguide at the frequency of 2.5 THz. The mode also tends to be a near-Gaussian in shape, easy for coupling to transmitter and receiver. The lowest propagation loss of 0.13 dB/m is obtained for the mode in a circular waveguide with 2200 μm bore diameter by using a full-vectorial finite element method. It is also shown here that rectangular and elliptical waveguides with a similar core area offer a lower loss value for the
$\boldsymbol{H}_{21}^{\boldsymbol{y}}$
mode and the
$\boldsymbol{L}{\boldsymbol{P}^{02}}$
mode, respectively, compared to a circular waveguide. Besides this optimized rectangular waveguide not only shows a minimum loss of 0.09 dB/m but with 4 times higher loss for the other polarization, hence the polarization state of the signal can also be maintained in this waveguide.
© 2018 IEEE
PDF Article
More Like This
Design, fabrication, and characterization of a single-polarization single-mode flexible hollow waveguide for low loss millimeter wave propagation
Menghui He, Zhangxiong Chen, Jiafu Zeng, Kewang Chen, Sheng Liu, Xian Zhang, Xiaosong Zhu, Chengbin Jing, Chao Chang, and Yiwei Shi
Opt. Express 30(6) 10178-10186 (2022)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription