Trapped image guide leaky-wave antennas for millimeter wave applications

The Millimeter Wave Radiation of a Dielectric Leaky-Wave Antenna Coupled with a Diffraction Grating for the Broadside Radiation: Narrow-Face Interaction

“…The coupling distance was fixed (d=1 mm) along the measurements. 8 Measured normalized E y field patterns in x-z plane illustrated with the solid lines for several frequencies of this antenna is given in Fig. 4.…”

“…There are some differences between our proposed structure and known DLWAs in the literature such as inverted-strip DLWAs[2,3] and periodically metal-strip loaded DLWAs[4][5][6][7][8][9][10][11][12][13][14][15] in terms of the perturbation style and physical constructions of the antennas. These differences were explained in[16] 2.…”

The Millimeter Wave Radiation of a Dielectric Leaky-Wave Antenna Coupled with a Diffraction Grating: Broad-Face Interaction

“…As a result, to make a correct design, designer has to decide which parameter is more important than the other to him and choose correct grating dimensions. 11 3.6 Different grating profile Another topic in the paper is to compare the radiation of the DLWAs coupled with gratings, which have two different teeth profiles. For this aim, a grating with rectangular profile 12 were manufactured (Fig.…”

“…In this structure, bound surface waves (slow wave) interacts with the periodic diffraction grating and some part of this wave transforms to the volumetric propagating wave (fast wave). This type of structure can be classified as a leaky-wave antenna [3,4] in general and dielectric leaky-wave antenna (DLWA) [5][6][7][8][9][10][11][12][13][14][15][16][17] in particular. There are examples of DLWA in the literature.…”

“…There are examples of DLWA in the literature. Inverted-strip DLWAs [5,6] and periodically metal-strip loaded DLWAs [7][8][9][10][11][12][13][14][15][16][17]. In those examples, the dielectric image line was in contact with the grating and the grating had a discrete form.…”