A five elements sequential rotation array arranged in a single‐layer pentagonal substrate

Abstract

A pentagonal circular polarized subarray composed of five elements is proposed for operation at 2.45 GHz. The array is based on the sequential rotation architecture (SRA), implemented with a sequential phase distribution network. Despite a more complex design in comparison to the canonical 4‐elements SRA, a pentagonal subarray is more suited to be packed in a Bucky‐ball or icosahedral arrangement, ideal for smart antennas with wide angle spatial coverage. A single‐layer via‐less prototype is fabricated on a common FR4 substrate. Measurements show a realized gain of 6.15 dBi with a polarization purity exceeding 20 dB at 2.45 GHz. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1077–1081, 2017

Circularly polarised sequential array with enhanced gain and bandwidth for applications in C ‐band

“…The patch element of the proposed array is based on a design originally proposed in [14], and already employed for SRA array, [12, 15], for indoor positioning [3], and for vehicular communications in the C ‐band [16, 17]. For the sake of completeness, the patch design is briefly summarised here, and its geometrical parameters shown in Fig.…”

Low profile circularly polarized antenna based on printed monopole

“…Analysis in Ref. shows that the sequential rotation technique can increase the axial ratio bandwidth, which leads this technique an effective method in the design of CP antennas …”

“…2 shows that the sequential rotation technique can increase the axial ratio bandwidth, which leads this technique an effective method in the design of CP antennas. 3,4 Quadrifilar helix antennas and microstrip patch antennas are commonly used in navigation systems. In fact, quadrifilar helix antenna is a special application of sequential rotation technology.…”

16‐Element circular polarised antenna array based on sequential arrangement of non‐identical disc patches

“…Element design: The proposed antenna is based on a disc-based patch already employed for the sequentially rotated array [1,2]. Hence it is only briefly summarised for the sake of completeness.…”

“…In the ideal case, the modules of the four desired transmission parameters, |Ŝ n,0 |, are identical to 1/2, and the desired incremental phases,f n+1,0 −f n,0 , is equal to 2p/n, for n = 1, 2, 3, 4. In view of this consideration, an optimisation procedure is carried out [2] with the following cost function measuring the error between the realised values S n0 and the nominal valuesŜ n0…”