A novel substrate integrated waveguide SIW slot antenna for E-band communications has been proposed in the paper. The antenna has been designed at two-layer LTCC substrate in 71-76 GHz frequency band. The measured return loss is below 9 dB at. May 16, 2013 · Using two slots backed by a circular SIW cavity, one can improve antenna gain by 2.3 dB over the gain of the single-slot antenna at the cost of a slight increase of the antenna dimensions. The maximum gain of the circular cavity backed two-slot antenna is 7.7 dB at 9.59 GHz with a broadside radiation pattern and with the desired input matching. Fig. 1a shows the top view of the SIW slot array antenna. There are totally 4 × 32 slots on the broadwall of the SIWs. In each row, two 16-element linear arrays are placed end to end with a distance of d 1 between the two starting slots. The central portion of the antenna is occupied by the feeding structure and is thus slot free, which is the bottleneck of sidelobe suppression. The effects of d 1. Thus, an SIW cavity-backed wide slot antenna is formed with size of siw1 and 1, and it is fed by the SIW with the width of siw. 1 and are the diameter of the via-hole and the spacing between adjacent via-holes, respectively.
The SIW antenna is constructed into one substrate with height h = 0.508mm, dielectric constant, mm is the width of SIW. The post diameter is D =0.8 mm and the P=1.5 mm is the cylinder spacing. The resonant length of the slot is approximately L=7.8 mm and the slot width is 1.4 mm. A few SIW-based slot array antennas that have been reported so far consist of one layer of substrate and are fed from one end through a coplanar feed network that significantly increases the size of the antenna . Furthermore, radiation from microstrip feed lines can severely compromise the low side-lobe level of the slot array. A TE20-mode substrate integrated waveguide SIW fed slot antenna array is proposed at 140 GHz for fabrication ease and cost reduction.
Aug 28, 2015 · The configuration of the proposed CSRR-fed SIW cavity-backed fractal patch antenna is illustrated in Figure 1. It consists of three metallization layers and a stack of two substrates with thicknesses of h 1 and h 2 and relative dielectric constants of ε r 1 and ε r 2, respectively. Abstract: By etching longitudinal slots on the top metallic surface of the substrate integrated waveguide SIW, an integrated slot-array antenna is proposed in this letter. The whole antenna and feeding system are fabricated on a single substrate, which takes the advantage of small size.
slots are cut on the top surface of the SIW and placed next to the short circuit termination of the SIW. The The coupling slots act like a magnetic dipole antenna with a strong E- ﬁ eld across. B. Slot Antenna on SIW Slot antennas are popular omnidirectional microwave antennas. Unique features of these antennas are horizontal polarization and omnidirectional gain around the azimuth. The slot length is generally λ g /2 which is cut on the top wall of the waveguide. A slot cut into the wall of a waveguide interrupts. The dual of a slot antenna would be if the conductive material and air were interchanged - that is, the slot antenna became a metal slab in space. An example of dual antennas is shown in Figure 2: Figure 2. Dual antennas - left the slot antenna, right the dipole antenna. The open area, or the ‘slot,’ can be of any shape and size, but is shown in Figure 6.16 to be rectangular, as is often done for simplicity. As shown in this figure, a slot antenna may be excited by applying a voltage source across the slot. FIGURE 6.16.
A dual-band Substrate Integrated Waveguide SIW based slot antenna is presented, it's excited by microstrip line and size is 4 × 9.034 × 0.381 mm 3. The Computer Simulation TechnologyCST studio suite software is used to design and simulate the proposed design. CP antenna was obtained. However, those SIW cavity-backed antennas were usually loaded with extra feeding networks, which make the antennas larger and not suitable for array application. In this paper, a circularly polarized substrate integrated waveguide cavity-backed antenna based on a slot split ring SSR is proposed. A SIW slot antenna is developed as described in  and has been applied in many designs. Very recent years, researchers try to realize some SIW frequency-agile components, including ﬂlter , VCO , phase shifter , and antenna [27,28]. 2.2 SIW single slot antenna A SIW resonant single-slot antenna is shown in Fig. 5. This is a simple type of slot antenna. The coupling slots are cut on the top surface of the SIW. Fig.5: SIW Single slot antenna In order to combine SIW and microstrip technologies, microstrip-SIW transitions are very required -[13-14].
SIW cavity backed slot antennas with circularly polarized radiation were firstly discussed in [3, 5, 9], whose SIW backed cavity with two dimensions rotational symmetries was requisite. Crossed slot at the center of one metal surface of the SIW backed cavity was adopted as a radiating element.
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