slot array antenna

Multiple slots act as a directive array antenna and can emit a narrow fan-shaped beam of microwaves. They are used in standard laboratory microwave sources used for research, UHF television transmitting antennas, antennas on missiles and aircraft, sector antennas for cellular base stations, and particularly marine radar antennas. A slot antenna ... Slotted array antennas are popularly used in radar applications, in which case design standards require mechanical robustness and high gains. Because the power transmission of radar antennas is very high, slot array antennas are preferred alternatives to planar arrays. Slotted antenna arrays used with waveguides are a popular antenna in navigation, radar and other high-frequency systems. They are simple to fabricate, have low-loss (high antenna efficiency) and radiate linear polarization with low cross-polarization. These antennas are often used in aircraft applications because they can be made to conform to ... Abstract. Radial line slot array (RLSA) antenna was initially developed for satellite antenna receivers at a frequency of Ku-band. The success of this development inspired researchers to continue the study to other bands and other applications, such as Wi-Fi at 5.8 GHz. A waveguide slot antenna is a radiating slot antenna cut on a waveguide. This chapter focuses on slot antennas and their arrays on rectangular waveguide (s) of metal. Typically, the waveguide is hollow but sometimes it is filled with dielectric to reduce the guided wavelength. A compact three-dimensional (3-D) metal-printed ridged waveguide slot array antenna with wideband, dual linear polarization and low cross-polarization is presented for X-band applications. To demonstrate the advantages of the proposed 16 × 8 waveguide slot array antenna, the electrical performance among several low-SLL array antennas are listed and compared in Table 3. Compared with others’ works, the proposed antenna can maintain relatively low SLLs in both E- and H-planes and realize rather high radiation efficiency at the ... The antenna has a narrow band behaviour as it is expected for a slotted waveguide array, still there are applications where this bandwidth will be sufficient. Figure 10 Picture of the two pieces ... This paper introduces a rectangular grating waveguide slot array antenna that provides a method for the design of satellite communication (SATCOM) receiving antennas. By integrating the radiating slots with a rectangular grating waveguide, which functions as a frequency-selective transmission line, the antenna realizes an extra filtering response. The operation bandwidth and out-of-band ... A compact three-dimensional (3-D) metal-printed ridged waveguide slot array antenna with wideband, dual linear polarization and low cross-polarization is presented for X-band applications. The proposed design achieves a compact structure due to the method of using a ridged waveguide (RWG). A vertically linear polarized (VP) array is realized through eight longitudinal shunt slots etched on the ... In this paper, multilayer feeding network for linear slot array antenna is studied. A substrate integrated waveguide (SIW) corporate-feed network for linear slot array antenna based on three layers is presented. This design has eight right-handed circularly polarized radiation elements, one power divider with SMA connector to SIW adapter structure and six SIW power divider by coupling slot ... This paper presents a thin 2 × 2 circularly polarized slot array antenna that operates in the high-band ultra-wideband (UWB) system. The proposed antenna is composed of three parts: a top metal part that consists of an L-shaped slot structure, a dielectric substrate, and a bottom floating metal layer. The design model and characteristics of the antenna element and array antenna are ... Each element of the antenna radiates evenly. Compared with a traditional waveguide slot array antenna, the beam of the antenna is always in the normal phase [Reference Wang, Zhang, He, Chen and Yang 19]. The simulated RHCP and left-hand circularly polarization patterns of 5.5, 5.7, and 5.9 GHz in the E- and H-planes are shown in Fig. 12.