Planar Leaky-Wave Antenna With Flexible Control of the Complex Propagation Constant

W-Band Planar Wide-Angle Scanning Antenna Architecture

“…The capability to realize LWAs with flexible control of the propagation constant in SIW technology has been demonstrated in [22] by means of Ku-band examples. The operating principle is based on a SIW (see Fig.…”

“…The operating principle is based on a SIW (see Fig. 1), where one row of vias is sufficiently dense to operate as a fully reflecting sidewall [26], while the other row of vias is more sparse so that it performs as a partially reflecting sidewall [22]. The latter is exploited to control the excitation of an equivalent magnetic current at the edge of a parallel plate waveguide section, which radiates into free space.…”

“…1), the magnitude of the radiating equivalent magnetic current can be reduced/increased and hence predominantly determine the leakage constant. Full-wave electromagnetic modeling can be used to decouple the two effects and the application of this technique in the design of LWAs with independent control of the beamwidth and the beam-pointing angle can be achieved [22].…”

“…These antennas offer significant complexity, cost and volume advantages for mm-wave sensing and communications applications when compared to phased arrays or reflector antenna architectures [18]. They can be implemented in either bulk micro-machined [13,[19][20][21] or planar PCB compatible [15,[22][23][24] technologies. Additionally, frequency beam scanning is an inherent feature in this class of antennas.…”

The design of the one-eighth mold SIW (EMSIW) omnidirectional antennas

“…Considering the symmetry, Omni-directional of the antenna, 2 units, 4 units and 6 units antenna array model is built in figure 4 (a) 2 unit (b) 4 unit (c) 6 unit In Figure 5 also shows the gain of each antenna. [7]Through lots of simulation and operation, six units antenna array model in the reflection coefficient and gain performance is much better than the other two, so six single array elements combined into an Omni-directional antenna array through a simple network integration has become the best choice of the antenna design. The production and the measured results Figure 6, Figure 7 and Figure 8 show the production of EMSIW antenna.…”