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[IEEE 2019 49th European Microwave Conference (EuMC) - Paris, France (2019.10.1-2019.10.3)] 2019 49th European Microwave Conference (EuMC) - Viability of using additive manufacturing for horn antennas fed with empty substrate integrated waveguide
摘要： Substrate integrated waveguides reduce the losses when compared to traditional planar transmission lines, while maintaining their low profile, and low cost manufacturing. The losses have been further reduced by partially or fully removing the dielectric, and many microwave devices have been successfully implemented with empty substrate integrated waveguides, including H-plane horn antennas. The directivity of the horn antenna can be increased using 3D pyramidal horns, and sacrificing the low profile. However, the low cost can be maintained by using additive manufacturing. In this work the viability of using additive manufacturing for two horn antennas fed with empty substrate integrated waveguide is studied.
关键词： three-dimensional printing,pyramid horn antenna,substrate integrated waveguide,Empty substrate integrated waveguide,exponential horn antenna
更新于2025-09-16 10:30:52
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3-D empty substrate integrated waveguide phase shifter with equal length
摘要： In this letter, a novel 3-D empty substrate integrated waveguide (ESIW) phase shifter with equal length has been proposed. The vertical transitions have been introduced into 3-D ESIW phase shifter in the propagation path. Based on it, the di?erent total lengths of phase shifters in the propagation path and the equal total lengths of phase shifters in the external structure are compatible. The phase shifter consists of multi-layer PCB: top layer, interlayer, middle layer, ESIW PCB, and bottom layer. The theory and design process of ESIW phase shifter have been explained and discussed in detail. To demonstrate its feasibility, the 3-D ESIW phase shifters with equal external length are designed, manufactured and measured. Final results show that the phase shifts of 45.2° 2 3.7° and 89.7° 2 4.7° can be achieved over the entire Ka-band. Besides, the return losses and the insertion losses are better than 12.5 dB, and 1.9 dB, respectively.
关键词： phase shifter,3-D empty substrate integrated waveguide (ESIW),vertical transition
更新于2025-09-16 10:30:52
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Single coupled cavity filter design with dielectric resonators posts for millimeter‐wave applications
摘要： In this work, a single coupled cavity has presented for millimeter-wave applications. The cavity is modeled to study the effect on the quality factor by adding cylindrical posts to coupled cavity resonator. This cavity model demonstrates a higher quality factor result and better performance compare to empty substrate integrated waveguide (ESIW) filter. The concept of enhancing the quality factor by adding posts is achieved. Based on this concept, the coupled cavity and bandpass filter are presented to show the feasibility of the fabrication process for building an ESIW filter where cylindrical posts is placed in middle on the planar substrate. The introduced cavity offers very good performance around (1%) fractal bandwidth at 24.7 GHz center frequency with Q-factor of 2236. A cavity prototype is fabricated and measured where measurements agree well with simulation.
关键词： quality factor,coupled cavities,empty substrate integrated waveguide,resonators dielectric posts
更新于2025-09-12 10:27:22
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Wideband Transition for Increased-Height Empty Substrate Integrated Waveguide
摘要： Recently, Empty Substrate Integrated Waveguide (ESIW) technology was proposed for embedding empty waveguides into planar substrates in order to improve their performance. A low-loss and narrow-band transition from microstrip to an increased height ESIW with 4 layers was presented in a previous work, and used to implement a very high-quality factor bandpass filter at Q-band. With such a narrow-band transition, based on a quarter-wavelength transformer, a very narrow-band filter response with resonators having a quality factor of 1000 was achieved. In this paper, in order to overcome the narrow-band and the 4-layers output restrictions, and extend the practical use of such increased height ESIWs beyond narrow-band filters, we present a novel wideband transition from microstrip to an increased height ESIW with an arbitrary number of layers. A full suite of wideband transitions to increased height ESIWs, built with different number of substrate layers ranging from 3 to 8, has been designed in this work to operate at Ka-band, though they can be easily transferred to other bands if the dimensions of the transition are properly scaled. To illustrate this, the original Ka-band transitions have been mapped to Ku-band, with excellent results. In order to test the proposed design method, a prototype of a 4-layer structure has been fabricated at Ka-band, achieving a good performance in the whole useful bandwidth of the ESIW.
关键词： Empty substrate integrated waveguide,multilayer,SIW,substrate integrated waveguide,substrate integrated circuit,microstrip transition,high quality factor,SIC,ESIW
更新于2025-09-11 14:15:04