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Sequential feeding network with adjusting stubs for dual circularly polarized 4 × 4 radiating elements
Source publication
In this article the analysis and design of a dual circularly polarized 4 × 4 antenna array operating in Ku band are discussed with emphasis on its sequential feeding network. The proposed antenna element is composed of stacked circular patches fed by a branch line coupler to introduce dual circular polarization. These antenna elements are arranged...
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Citations
... The CP antenna can be achieved by introducing a single feed on the regular unit cell [1][2][3][4][5][6][7][8][9]. Guo and Tan proposed a wideband single-feed CP unit cell antenna [3]. ...
... There are some papers on the design of a multipolarized antenna using SR technology with two ports [1,[13][14][15][16]]. An SR antenna array for millimeter wave is proposed in [13]. ...
... Using sequentially rotated feed networks, Shen et al. presented a dual-CP array in [15]. Ibrahim et al. designed an antenna consisting of some unit cells in [1]. The feed port supplies power to these unit cells with the same current and appropriate phase delay. ...
In this paper, a simple broadband multipolarized traveling-wave series-fed antenna array is proposed. The radiation unit cells are multiple squares. The square unit cell will change between circular polarized (CP) and linear polarized (LP) through a reasonable feeding mode. By adjusting the equivalent length of the unit cell, the Q value of the antenna can be reduced, resulting in the increase of the bandwidth of the array. The array consists of seven-unit cells and dual-port feeding. The unit cells which are connected by a microstrip line are arranged in a circular array. A reasonable layout of unit cells can achieve good port isolation of the array. The polarization performance of the array antenna is the same as that of the unit cell. The antenna is fabricated and measured. The measured results are consistent with the simulated results.
... However, the design of CP elements with wide axial ratio (AR) bandwidth is usually difcult [7][8][9][10]. Another way to design a wideband CP antenna array is by using a sequential rotation (SR) technique based on LP or CP elements with unique angular and phase arrangements [11][12][13][14]. Up to now, many kinds of wideband CP arrays have been proposed with various sequential rotation (SR) feeding networks, such as series-feeding networks [11], corporate-feeding networks [15][16][17][18][19], and series-parallel feeding networks [20][21][22][23]. ...
This paper presents a novel Ku wideband circularly polarized (CP) antenna array composed of crossed-dipole element (CDE) and fed through sequential rotation (SR) feeding technique. Unlike the traditional CP-CDE fed by coaxial cable that usually works at low frequencies, the proposed CDE consists of two orthogonal heart-shaped patch dipoles that can work at frequencies as high as Ku-band, at the same time achieving a larger bandwidth. A feeding structure is proposed without welding, so potential errors in the antenna assembly process can be mitigated. A 2 × 2 CP antenna array with wideband SR feeding network is designed based on the CDE to further expand the axial ratio (AR) bandwidth. The designed antenna array is fabricated using the multilayer printed circuit board (PCB) technology and measured in anechoic chamber using the planar near-field measurement facility. The measured results show that −10 dB impedance bandwidth of 44% (11.6–18.15 GHz) along with 3 dB AR bandwidth of 38.7% (12–17.65 GHz) and 3 dB gain bandwidth of 34.6% (12.2–17.3 GHz) as well as 11.02 dBic peak gain have been achieved while maintaining a lower profile.
... This indicates that in the case of dual circular polarization, expanding the number of layers in the feeding network involves the construction of a broadband feeding network. increases cost, complexity and handed the difficulties of manufacturing [3,4]. For this reason, a broadband CP slot antennas have been intensively investigated due to their apparent features such as low profile, wideband, and ease of construction [5]. ...
... Many dual CP antennas with various structures and process technology were reported. A common method is adopting a feed network, which can output two signals with equal amplitude and orthogonal phase, [1][2][3][4][5][6][7][8] and this type of dual CP antennas have excellent performance of directional radiation. Nevertheless, the configuration of the feed network and 90 phase shifter was ingenious and complex to design. ...
In this article, a broadband dual circularly polarized (CP) antenna with simple structure and high gain is designed. A metal ridge septum with the shape of the cascade of a rectangle and a triangle is embedded into the square waveguide to excite CP wave, which is presented through analysis and simulation. By feeding the antenna at the two positions with respect to the symmetrical position of the septum, it can form the right‐handed circularly polarized (RHCP) and left‐handed circularly polarized (LHCP) wave, respectively. To verify the design, a prototype of the antenna is fabricated and measured. The measured and simulated results coincide with each other. According to the simulation and measurement, the designed antenna can work well within a relative bandwidth of 64% from 8.5 to 16.5 GHz. The proposed dual CP antenna has the simple configuration and good performance, and it can be a good candidate antenna for the broadband communication system.
... However, in the present case, it is required to develop a wideband antenna element with dual circular polarization. The appropriate configuration in this case is a stacked symmetric microstrip patch fed by a wideband branch-line coupler [13], [18], and [22]. ...
This paper presents analysis and design of a dual circularly polarized 16×16 Ku band antenna array with emphasis on its feeding network. The proposed antenna is designed for on-move satellite communication system where the radiation pattern and the side-lobe level should meet the ITU standards to avoid interference with other satellite systems. This requirement is obtained by using non-uniform feeding distribution network. In addition, dual circular polarization operation requires sequential feeding networks with appropriate phase shift sequences. The proposed antenna is divided into 16 sub-cells of 4×4 radiating elements. The elements inside the sub-cell are fed by uniform dual sequential feeding networks. These sub-cells are connected together via two non-uniform feeding networks on a single layer in the shape of two interlaced fork configurations. In addition, cascaded power dividers are used to achieve the required low power division ratios between some of the sub-cells according to the required feeding distribution. These modifications simplify the fabrication process of the proposed antenna structure and reduce the required layers while satisfying the required radiation parameters.
... However, in the present case, it is required to develop a wideband antenna element with dual circular polarization. The appropriate configuration in this case is a stacked symmetric microstrip patch fed by a wideband branch-line coupler [13], [18], and [22]. ...
