The strain vector for
leaky wave on boundary [GAMMA]1 is:
Dandekar, "Two port reconfigurable crlh
leaky wave antenna with improved impedance matching and beam tuning," in Proceedings of the 3rd European Conference on Antennas and Propagation, EuCAP 2009, pp.
We remind that spatial dispersion is intrinsically taken into account by the TEN and TEN-PO approaches in Sections 2.2 and 2.3, respectively, whereas can be approximately considered by the MoM method in Section 2.4, assuming that the field excited by the elementary source is dominated by a given surface or
leaky wave. In the latter case, the radial propagation wavenumber [k.sup.SW/LW.sub.[rho]] of the relevant surface or
leaky wave is used in (25).
As expected for
leaky wave antennas, it is observed a beam pointing swept of five degrees from the bandwidth lowest frequency to the highest one, either in the simulations (Figure 7(d)) and measurements (Figure 7(e)).
Short Tapered
Leaky Wave Antenna Design with Complementary Split Ring Resonator
The antenna was composed of periodically arranged radiating printed cells which constitute an array that performs as a
leaky wave radiating scheme, in which the direction of maximum radiation depends on the propagation constant of the wave which travels on the array.
The active radiometry method has also helped in the research of slotted lines, to detect
leaky waves predicted in theory, but impossible to detect with CW probing.
In this paper, it has been proposed a
leaky wave antenna excited in a configuration including various dielectric slabs positioned above a spoof plasmon waveguide.
Examples of such solutions are only sporadically present in the literature: recently published research on
leaky wave antennas [5], frequency selective surfaces [6], reflectarrays [7], radomes [8], tunable nanoantenna [9], generation of high-order harmonics [10], and so forth demonstrates the wide range of possible applications.
To feed more radiating elements for higher gain, the
leaky wave antenna array is one of the prospective candidates, such as the rotated dipoles [17] to achieve horizontally polarized omnidirectional pattern in the azimuthal plane.
However, the microstrip
leaky wave only radiates efficiently over a fixed bandwidth, which, in practice, limits maximum scanning.
Alternatively, the antenna can be viewed as a two-dimensional
leaky wave antenna, in which the primary source excites a pair of cylindrical TMz and TEz leaky modes; these propagate along the structure and give the main contribution to the antenna aperture field, thus establishing the main features of the antenna radiation pattern [7, 8].