Additively manufactured high gain cavity backed Ku-band slot antenna

Asci, Yavuz; Yeğin, Korkut

doi:10.1016/j.aeue.2021.153746

Cited by 5 publications

(6 citation statements)

References 17 publications

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“…Figure 1A–D show the geometry and parameters of the 2 × 2 subarray, which is based on the study 37 scaled to 5G mmWave bands. It is composed of three layers from bottom to top: the feed layer, the cavity layer, and the radiating layer.…”

Section: × 2 Subarraymentioning

confidence: 99%

“…The wideband characteristics can reduce the number of antennas and the size of the overall communication systems. With this aim, based on our previous work, 37 2 × 2 subarray is rescaled to the 5G mmWave band and further studied. It is hard to design a corporate feed network that excites every radiating slot one by one while taking deployment, routing, and fabrication issues into account in a confined space.…”

Section: Introductionmentioning

confidence: 99%

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Broadband, high gain 2 × 2 subarray and 2 × 8 cavity‐backed antenna arrays for 5G mmWave applications

Asci

2023

Micro & Optical Tech Letters

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In this study, linearly polarized 2 × 2 subarray and 2 × 8 element cavity‐backed antennas are proposed for 5G millimeter‐wave (mmWave) applications. Initially, the 2 × 2 subarray is designed, manufactured, and tested. According to the measured results, the 2 × 2 subarray has a wide fractional bandwidth (FBW) of 24.7% (|S11| < −10 dB, 22.3‒28.6 GHz) which covers the main spectrum allocations for the 5G cellular network. A broadband 1 × 4 corporate feed network is designed, which is challenging and crucial, to form 2 × 8 antenna array. The experimental results show that the final 2 × 8 antenna array has a wide FBW of 23% (|S11| < −10 dB, 22.3‒28 GHz), with a boresight gain of 20.5 dBi. Throughout the operating band, a stable gain of 19.5 ± 1 dBi is achieved. The 2 × 8 antenna array has good and stable radiation characteristics; SLLs are less than −13 dB and XPol is better than −20 dB for both E‐ and H‐planes across the entire operating frequency. Stubs are added between adjacent subarrays in the E‐plane to suppress mutual coupling and to improve gain of 2 × 8 antenna, which results in broadband impedance characteristics. The size of the 2 × 8 antenna array is 6.3λο × 8.1λο × 1.3λο, where λο is the free space wavelength at 25 GHz. These results show that the proposed antenna has potential for 5G millimeter‐wave applications requiring broadband and high gain.

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Section: × 2 Subarraymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Broadband, high gain 2 × 2 subarray and 2 × 8 cavity‐backed antenna arrays for 5G mmWave applications

Asci

2023

Micro & Optical Tech Letters

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“…Although the final product (antenna) to be connected in physical satellite should have CNC‐based manufacturing with good metal such as aluminum, 3D printing technology and metal spray coating, which are recently popular additive manufacturing techniques for fast and cheap prototype production, and verification of antennas or microwave components (Asci & Yegin, 2020, 2021; Carkaci & Secmen, 2020; Miralles et al., 2019), are realized in this study. Therefore, in order to make the simulation results consistent with measurement results, the material parameters and thickness of metal spray coating are inserted in simulations performed by CST MWS.…”

Section: The Design Steps and Overall Structure Of The Proposed Antennamentioning

confidence: 99%

Single Waveguide Feed Omnidirectional and Circularly Polarized Transceiver Waveguide Slot Antenna for Satellite Communication Applications

2022

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In this study, an omnidirectional and circularly polarized transceiver antenna, which can be used in simultaneous operations over transmit (TX) and receive (RX) channels for telemetry, tracking, and command (TTC) applications on the space segment of satellite communication, is proposed. The radiation and feed parts of the antenna consist of waveguide structures for high power necessity in transmit (telemetry) section. The radiation part includes two different sections of rotationally symmetric slotted arrays on circular waveguide, and radially outward metallic disks to improve omnidirectionality and circular polarization. The feed part contains a dual‐band mod converter from rectangular TE10 mode to circular TM01 mode for symmetric field excitation over slots where the input of the converter is the standard rectangular waveguide. The design, simulation, and measurement results of the antenna are shown over a 3D printed prototype at Ku‐band with center frequencies of 12 GHz and 14.25 GHz for TX and RX, respectively. With thin slots in telemetry section and thick slots in telecommand section, measured bandwidths for TX and RX frequencies are obtained approximately as 200 and 450 MHz, respectively. While TX band with maximum 3 dB gain variation over azimuth, maximum 3 dB axial ratio and minimum −3 dBi gain over 70° elevation beamwidth has relatively better performances at the expense of narrow bandwidth, RX band has maximum 3.5 dB gain variation over azimuth, maximum 4 dB axial ratio and minimum −6 dBi gain over 55° elevation beamwidth at the expense of wide bandwidth.

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“…Since producing metallic structures via a 3D printer is a considerably expensive procedure, recent studies in this area have focused on metalizing dielectric materials and various methods have been proposed in the literature. Accordingly, nickel [12,13], silver [14,15], gold coating [16] and electroplating [17] are encountered in engineering applications. One of the main problems here is that although the primary purpose is to reduce the budget of the final structure, the coating materials and sprays containing expensive elements such as nickel, silver, and gold are not satisfactorily low-cost.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of cost comparison, silver and gold plating methods are more expensive than nickel plating, while the conductive tape covering is drastically less costly than the other methods [12,14]. The aerosol coating techniques have a drying time of approximately 24 h. In the metalization process with conductive tape, the coating process generally finishes at the order of minutes or a few hours, depending on the geometrical complexity of the structure.…”

Section: Introductionmentioning

confidence: 99%

Cost-effective experiments with additively manufactured waveguide and cavities in the S-band

Karatay

Yılmaz

Özkal

et al. 2023

Meas. Sci. Technol.

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This study demonstrates the applicability of additively manufactured components that are metalized with conductive tape for two different microwave experiments. We focus on dielectric measurements and prototyping elliptical accelerator cavities at a low power regime for 2.45 GHz. To illustrate the accuracy of our results for the commonly used solid/liquid materials in engineering and to compare the fundamental accelerator cavity parameters with previous research rectangular and elliptic 3D-printed cavities coated with aluminum-type tape were employed in the experiments. Results reported for the complex-valued permittivities and specific design parameters for the cavity prototype are consistent with the literature. Various approaches to obtain the conductivity value of the tape and the effect of the roughness/thickness of the coating on the reflection parameter are discussed in detail. We confirm the effectiveness of the proposed approach, which reduces costs and provides a high degree of accuracy for investigated applications.

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Additively manufactured high gain cavity backed Ku-band slot antenna

Cited by 5 publications

References 17 publications

Broadband, high gain 2 × 2 subarray and 2 × 8 cavity‐backed antenna arrays for 5G mmWave applications

Broadband, high gain 2 × 2 subarray and 2 × 8 cavity‐backed antenna arrays for 5G mmWave applications

Single Waveguide Feed Omnidirectional and Circularly Polarized Transceiver Waveguide Slot Antenna for Satellite Communication Applications

Cost-effective experiments with additively manufactured waveguide and cavities in the S-band

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