A ground-plane antenna comprises a quaterwave resonant radiating rod (1) made of a hollow tube in which a central earthing rod (7) is arranged to form with the internal cylindrical wall of the radiating rod a line section short-circuited at the upper end. A further line section (16) ...
An flat antenna ground plane supporting body including a longitudinal channel defining a waveguide for the antenna and two rectangular grooves which extend along the length of the channel and which are arranged on either side of the channel so as to define a double quarter-wave trap. The part ...
If you remove one half of a dipole antenna and place it perpendicular against a conducting ground plane (Figure 5.22), you have made a monopole or quarter-wave antenna. The ground plane acts similarly to a mirror and reflects the quarter-wavelength wire. As a result, the propagation character...
Hello guys, I was reading up on transmission lines and came across this resource they have the following image which looks like a quarter wave antenna to me since the length is λ/4 and terminated in open circuit. The text mentions that due to the λ/4 length the reflected wave wi...
iescwomoreks, ftahreamboinviem−u5m0 dtrBancsrmosissspioolnarleizvaetlisofnorlebvoetlshicnot-hpeoslayrsitzeamti.oTnhmuseathsuerqeumaelintytso(ftxliannedartyp)oalraeriazbaotiuotn−fr1o6m dBth, ewphhicohtois- conductive antenna is adequate for characterization of the waveplate ...
Planar metasurface based quarter-wave plates offer various advantages over conventional waveplates in terms of compactness, flexibility and simple fabrication; however they offer very narrow bandwidth of operation. Here, we demonstrate a planar terahertz (THz) metasurface capable of linear to circular pol...
The y- polarized incident wave will induce coupled surface currents at the top metasurface and ground plane. The direction of these induced currents influence the overall scattering from quasi-crystal metasurface. It can be noted from the direction of current distribution on both metasurface-plane ...
The present invention, 2 to a longitudinal channel (20) defining a waveguide of the antenna extends along the length of the channel (20), are arranged on both sides of the channel so as to define a double quarter-wave trap One rectangular grooves (31, 32) and the planar antenna ground ...
The Full-wave Electromagnetic Simulation Method The unit cell as well as super-cell structures are investigated and analysed through CST Microwave Studio using unit cell boundary conditions alongx- andy- axis. The metallic back plate/ground works as a perfect-reflector to the incident waves having ...
We further reveal that the designed double-stacked HMM waveguide array can function as an efficient quarter-wave plate that enables the conversion of linearly polarized light to circularly polarized light within a broad frequency band. In addition, the bandwidth over which the degree of linear ...