Rectangular waveguide periodically loaded with uniform E-plane strips on a dielectric substrate

1990 ◽  
Vol 137 (5) ◽  
pp. 241 ◽  
Author(s):  
K. Mahadevan ◽  
H.A. Auda
Keyword(s):  
Rectangular Waveguide ◽  
Dielectric Substrate

scholarly journals High-Gain Waveguide-Fed Circularly Polarized Spidron Fractal Aperture Antenna

2019 ◽  
Vol 9 (4) ◽  
pp. 691 ◽  
Author(s):  
Son Trinh-Van ◽  
Thuy Thi ◽  
Youngoo Yang ◽  
Kang-Yoon Lee ◽  
Kyung-Young Jung ◽  
...  
Keyword(s):  
Rectangular Waveguide ◽  
Fractal Structure ◽  
Ground Plane ◽  
Axial Ratio ◽  
Dielectric Substrate ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Aperture Antenna ◽  
Circularly Polarized ◽  
Measured Impedance

A high-gain rectangular waveguide-fed aperture antenna that uses a Spidron fractal structure to produce circular polarization is proposed. The antenna consists of a Spidron fractal aperture etched onto the ground plane of a dielectric substrate that is directly excited by a WR (Waveguide Rectangular)-90 waveguide-to-coax adapter. A superstrate was implemented at an appropriate distance above the antenna to enhance the broadside gain significantly. An antenna prototype was fabricated and tested to validate the design. The measured impedance bandwidth for | S 11 | ≤ −10 dB is 9.89–11.58 GHz (15.74%). The corresponding measured 3 dB axial ratio (AR) bandwidth is 10.68–11.00 GHz (2.95%), and within the measured 3 dB AR bandwidth, a maximum realized gain of 9.59 dBic is achieved. The radiation patterns of the proposed antenna are presented and discussed.

Single-peak-regulation and wide-angle dual-band metamaterial absorber based on hollow-cross and solid-cross resonators

2020 ◽  
Vol 91 (3) ◽  
pp. 30901
Author(s):  
Yibo Tang ◽  
Longhui He ◽  
Jianming Xu ◽  
Hailang He ◽  
Yuhan Li ◽  
...  
Keyword(s):  
Transverse Electric ◽  
Surface Current ◽  
Dielectric Substrate ◽  
Transverse Magnetic ◽  
Metamaterial Absorber ◽  
Absorption Peak ◽  
Dual Band ◽  
Single Peak ◽  
Wide Angle ◽  
Surface Current Density

A dual-band microwave metamaterial absorber with single-peak regulation and wide-angle absorption has been proposed and illustrated. The designed metamaterial absorber is consisted of hollow-cross resonators, solid-cross resonators, dielectric substrate and metallic background plane. Strong absorption peak coefficients of 99.92% and 99.55% are achieved at 8.42 and 11.31 GHz, respectively, which is basically consistent with the experimental results. Surface current density and changing material properties are employed to illustrate the absorptive mechanism. More importantly, the proposed dual-band metamaterial absorber has the adjustable property of single absorption peak and could operate well at wide incidence angles for both transverse electric (TE) and transverse magnetic (TM) waves. Research results could provide and enrich instructive guidances for realizing a single-peak-regulation and wide-angle dual-band metamaterial absorber.

LTCC Partially-Filled Post-Wall Rectangular-Waveguide Slot Array Antenna in the Millimeter-Wave Band

2012 ◽  
Vol E95.C (10) ◽  
pp. 1635-1642 ◽  
Author(s):  
Yuanfeng SHE ◽  
Jiro HIROKAWA ◽  
Makoto ANDO ◽  
Daisuke HANATANI ◽  
Masahiro FUJIMOTO
Keyword(s):  
Millimeter Wave ◽  
Rectangular Waveguide ◽  
Array Antenna ◽  
Wave Band ◽  
Waveguide Slot ◽  
Millimeter Wave Band

Drying of moisture packed beds due to microwave heating using a rectangular waveguide

2002 ◽  
Author(s):  
Kazuo Aoki ◽  
Phadungsak Ratanadecho ◽  
Takashi Mikawa ◽  
Masatoshi Akahori
Keyword(s):  
Microwave Heating ◽  
Rectangular Waveguide ◽  
Packed Beds

Cylindrical-Rectangular Waveguide Junction as a Model of Measurement Device

2002 ◽  
Vol 58 (5-6) ◽  
pp. 5
Author(s):  
A. V. Strizhachenko ◽  
A. A. Zvyagintsev ◽  
V. V. Chizhov ◽  
V. V. Andreev
Keyword(s):  
Rectangular Waveguide ◽  
Measurement Device ◽  
Waveguide Junction
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