A Radial Line Slot Array (RLSA) Antenna with the Specifications of 16 dBi Outdoor patch Antenna

Abstract

It is recommended by several researches that RLSA antennas have possibility as an option for Wi-Fi devices antennas. Therefore, to dig deeper this possibility, we designed a RLSA antenna that mimics the specification of an antenna usually found in market, that is 16 dBi outdoor patch antenna. We carried out a parameterization to get a best RLSA antenna model. The model was then fabricated and measured. The measurement results are quite agrees with the simulation results. We found that with the same size of 0.05 m2, our RLSA antennas has better performance in term of gain (2 dB higher), S11 (7 dB lower), and beamwidth (90 0 wider) compared to the patch antenna. A significant result is that RLSA antenna has much wider bandwidth (815 MHz wider) compared to the patch antenna. A test to our RLSA antenna as an antenna for Wi-Fi devices shows that it works properly.

Cutting Technique for Constructing Small Radial Line Slot Array Antennas

“…We observe that although the area of the half RLSA is the smallest, the gain is still the best. As an example, compared to the antenna in the study [22], the area of the half RLSA is 5.74 times smaller. Since, theoretically, the gain should decrease linearly with the decrease of the area, the gain of the half RLSA should be 5.74 times smaller, although in reality , it is only 4.47 times smaller.…”

“…Using this method, small RLSA antennas with a radius of 75 mm and at a frequency of 5.8 GHz could be designed without high reflection coefficients, which other techniques could not achieve previously. Several studies have also reported this technique's success in the development of small low-reflection antennas for the Wi-Fi market [22][23][24][25][26].…”

A design of radial line slot array antennas using the specification of panel antennas

“…We also chose polypropylenes as the dielectric material for the antenna. The material of copper and polypropylenes were chosen based on the successfully of their using in previous researches [21][22][23][24][25][26]. The values of all the material of antenna are listed in Table 2.…”

“…This technique also successfully minimizes the reflection coefficient [22]. Due to this success, Purnamirza recommended their technique to be implemented in designing small RLSA antennas [23][24][25].…”

A New Size Reduction Method for Radial Line Slot Array (RLSA) Antennas

“…In another study, Purnamirza introduced extreme beam squint technique to efficiently radiate power through slots, which significantly reduces power reflections [16]. This also led to the successful implementation of this technique to design several small Wi-Fi RLSAs for market needs [17]- [22].…”