A planar monomial is by definition an isomorphism class of a finite, planar, reduced rooted tree. If x denotes the tree with a single vertex, any planar monomial is a non-associative product in x relative to m−array grafting. A planar power series f(x) over a field K in x is an infinite sum of K−multiples of planar monomials including the unit monomial represented by the empty tree. For every p...

A dielectric rod antenna array fed by slot radiators without the use of metallic waveguide is presented here. Communication systems, especially those related to 5G, are moving up into mm-wave bands where metal losses can become significant and many traditional fabrication manufacturing techniques more difficult. Dielectric antennas (DRA) entirely made may be injection-molded or 3D-printed as so...

A study on the MIMO channel capacity of a modified dual-element planar inverted-F antenna (PIFA) array is presented. The dual-element PIFA array consists of two modified PIFAs which are mounted on a small mobile terminal operating at 2.5 GHz. The relationship between mutual coupling and channel capacity is analysed by comparing the modified dual-element PIFA array with a conventional dual-eleme...

Geiger-mode single-photon LiDAR is an important tool for long-distance three-dimensional remote sensing. A planar-array-based photon counting that uses 32-by-32 fiber arrays coupled to optical lens as a transceiver unit was developed. Using transmitters and receivers with the same design, proposed device easily achieves high-precision alignment of 1024 pixels flexible detection field-of-view de...

ABSTRACT In this paper, a method of a Multiobjective Optimisation based on Chebytshev’s method and Genetic Algorithm for the synthesis of planar array antenna was investigated. This method for antenna pattern synthesis could suppress multiple interferences by placing nulls at the directions of the interfering sources and placing the main beam in the direction of the desired signal by controllin...