A spectral domain approach for computing the radiation characteristics of a leaky-wave antenna for millimeter waves

Printed-circuit leaky-wave antenna with pointing and illumination flexibility

“…As it is well-known, decreases as the leaky-mode reaches the endfire direction 90 . Different technologies have been applied to conceive PLWA which present the same pointing-control behavior, as the microstrip [4], the dielectric grating [5], the strip-loaded dielectric slab [6] and the dielectric-inset waveguide [7]. However, the main contribution of the proposed antenna is that the leakage rate can also be controlled by using the same asymmetry radiation principle demonstrated in [1] for nonperiodic LWA.…”

“…In this way, can be controlled without affecting the pointing direction . This leakage control mechanism is the main novelty with respect to other PLWA [6], [7] which were based on slots printed along the whole width of the host dielectric waveguide . An example is given in Fig.…”

Simple estimation formulas for rectangular dielectric waveguide single‐mode range and propagation constant

“…Figure 3 shows the typical percentage difference between these two methods. The k z error is less than Ϯ1% on average while 8] used the well known but rigorous spectral domain method to compute the radiation characteristics of a periodic leaky-wave antenna (LWA) built around a 2:1 aspect ratio open dielectric guide. In Example 1, we enter the same physical characteristics in the new formulas to check that the operating frequency is within the single-mode range and find and compare the associated value of k z and the radiated beam angle for the antenna.…”

Efficient full‐wave analysis method of leaky‐wave modes in periodically loaded dielectric waveguides with application to backward‐to‐forward frequency‐scannable antennas and metamaterials

“…Some works were focused on periodic strips printed on a dielectric slab [8][9][10] (see Figure 1(c)), or printed on a dielectric inset guide [11] (see Figure 1(d)). These periodic strips fill the whole width of the dielectric slab, therefore creating a onedimensional periodic structure, which can be studied by only expanding the fields in terms of Floquet modes.…”

“…In this way, the microstrip PLWA shown in Figure 1(a) was studied in Reference [6], and in Reference [7] it was analysed the dielectric-grating PLWA sketched in Figure 1(b). The radiation of a dielectric slab, periodically loaded with an array of strips (Figure 1(c)), has been studied in detail in References [8,9,10]. Finally, the dielectric-inset PLWA, illustrated in Figure 1(d), was analysed in Reference [11].…”