Abstract
This paper presents the conception and realization of a 2D antenna array using periodic leaky-wave antenna (PLWA) and the binomial array (BA) at 6 GHz as the application of WLAN. The series array of periodic leaky-wave antenna was provided by an array of five rectangular Patches connected by cross lines. The nonuniform amplitudes of the binomial array are used to reduce the sidelobe level; in this way, the center source radiates strongly on the broadside. The prototype of the proposed 2D antenna array is designed, fabricated, and tested. A good agreement is obtained between simulated and measurement results.
Highlights
Nowadays, the practical applications of microwave antennas pose problems in performances, especially at the sidelobe level (SLL)
We used the binomial method because it gives a good performance with a minimum sidelobe level than the others [6]
At the open stopband frequency, the traveling wave supported by the periodic leaky-wave antenna becomes a standing wave, behaving to an antenna array in which all the radiating elements are excited with the same phase [12]
Summary
The practical applications of microwave antennas pose problems in performances, especially at the sidelobe level (SLL). In most applications of antenna arrays, sidelobe levels are commonly unwanted, especially the first sidelobe which is the main source of electromagnetic interference This later should be reduced without deforming the main beam of the radiation pattern. The leaky wave is a fast wave that has been extensively studied and used for more than four decades [11, 12], while the first planar leaky-wave antennas were reported in the 1940s [13, 14], mainly planar periodic leaky-wave antennas, due to having various advantages, such as low cost, simple fabrication, lightweight, and integration with electronic components These are often found in several microwave applications, for example, communication systems such as satellite links and sensor systems [15]. To reduce the sidelobe level, the binomial method is used to feed the power network of the parallel array antenna
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