Conformal antenna array for millimeter-wave communications: performance evaluation (original) (raw)
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Design of cylindrically bent antenna array on LCP substrate with large coverage at 60 GHz
Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP), 2011
The relative permittivity and homogeneity of LCP material have been characterized within the whole 60 GHz frequency band using the microstrip ring resonator (MRR) method. Using a circuit model, the gap capacitance of the MRR has been taken into account in order to improve the accuracy of the determined relative permittivity. The results show that the relative permittivity of LCP is almost constant (εr ≈ 3.1) within the whole 60 GHz frequency band. The homogeneity of LCP is within 1.5% across the LCP panel. A cylindrically bent antenna based on LCP substrate has been designed, which has 56.3–67.0 GHz bandwidth and 6 dBi gain. With the proposed equilateral triangle grid array topology and sub-array switching, the cylindrically bent antenna array with 16 antenna elements has 13.8 dBi gain up to ±60° scan angles.
ANALYSIS OF ANTENNA ARRAYS FOR MILLIMETER WAVE COMMUNICATION
IRJET, 2023
This research combines a front-end RFIC with arrays of antennas operating at 60 and 28 GHz to steer the beam inside a 50-degree arc. Antenna arrays operating at 28 GHz enable 5G's high-speed, broadband data services. In order to send such a large amount of data to the core network through a fixed wireless access (FWA) link, a broadband, highgain, steerable narrow-beam array is required. Antenna arrays at 60 GHz are presented in this thesis for use in FWA and backhaul applications. At 60 GHz (57-66 GHz), the proposed arrays consist of stacked patches and connected slots that are fed by a high gain lens antenna. Over 20 dBi of gain is available from the 216 stacked patches antenna array. The array and RFIC front end combine to provide a module with an EIRP of more than 40 dBm. The other array of 60 GHz antennas has sixteen parallel slots. A high-gain dielectric lens is fed by this source. This antenna has a maximum gain of 25.4 dBi. When the lens is used to deflect the beam away from the broadside, it actually increases in brightness. At 24.25-29.50 GHz, two tiny arrays of antennas transmit and receive. LP and CP arrays may be found in fan-out embedded wafer level ballgrid array (eWLB) packaging. Because the feed lines are shorter and there is no geometrical discontinuity, the antenna in package (AiP) approach saves money compared to PCB arrays and reduces integration losses. The LP array is made up of dipole antennas that are fed into a novel horn-shaped heatsink. The RF module's beam-steering range is 35°, and its peak EIRP is 34 dBm. The CP antenna array is made up of crossed dipoles, and the RF module can steer the antenna's beam by up to 50 degrees.
IMAPSource Proceedings
There is growing interest in the use of additive manufacturing for the fabrication of RF devices due to fast prototyping capabilities and the use of less material as opposed to traditional fabrication techniques. In addition to the previously mentioned advantages, the aerosol jet printing method in particular allows for the conformal printing of RF components. This work models the effect of the bend radius on the return loss and radiation pattern of a dual-band (28 GHz and 39 GHz) mm wave patch antenna array design that will be aerosol jet printed. The antenna is modeled on a 5-mil thick flexible substrate (PET) and the simulation is run from 27 GHz to 40 GHz using HFSS. The return loss and radiation pattern results of the antenna are compared for various bend radii (0.25 in to 2 in) of the conformal surface the antenna is to be printed upon. Simulation results show a maximum frequency deviation of about 400 MHz on the return loss for the low (28 GHz) frequency band of the antenna w...
Antenna Design and Beamforming for a Conformal Antenna Array Demonstrator
2006 IEEE Aerospace Conference, 2000
The present paper 1,2 gives an overview over a radar demonstrator currently under development and the design of the system's conformal antenna array front-end. Important system parameters and overall performance of the planned system are described and experimental results for reflection coefficients, mutual coupling and embedded antenna element far field patterns will be included as well as simulated pattern synthesis results for different operational modes. In addition, a circularly polarized antenna sub-array suitable for integration in double curved apertures has been developed. The structure combines multiple cavity-backed patch antennas on a circular substrate and is connected to the feed network via a single coaxial line. A conformal antenna array of spherical shape based on this technology is currently being built for beam forming experiments.
International Journal of Computer Applications, 2016
This geometry can offer certain characteristics that can't be achieve by planner antenna. Antenna is design to function in 2.4 GHz wireless radio band. This work present performance of 4-element conformal antenna array for cylindrical surface and observe effect of mutual coupling between patch. In this, angle is preserved to conform the shape to reduce extra drag. The radius of cylinder is considered to be atleast one quarter wavelength or slightly more. The simulated results shows its resonant frequency is not affected with change in curvature however the radiation patterns are significantly affected more in elevation direction and less in azimuth. Simulations has been carried on CST software.
Designing of a small wearable conformal phased array antenna for wireless communications
2012
In this thesis, a unique design of a self-adapting conformal phased-array antenna system for wireless communications is presented. The antenna system is comprised of a sensor circuit and one 1x4 printed microstrip patch antenna array on a flexible substrate with a resonant frequency of 2.47 GHz. When the performance of the antenna starts to degrade under non-planar orientation, the sensor circuitry compensates the phase of each array element of the antenna. The proposed analytical method for phase compensation has been first verified by designing an RF test platform that was used to calibrate the sensor circuitry by observing the behavior of the antenna array system on surfaces with different curvatures. In particular, this phased array antenna system was designed to be used on the surface of a spacesuit or any other flexible prototypege.
The cylindrical geometry can o®er certain desirable antenna characteristics that are not provided by planar elements. In this paper, a three-element cylindrical conformal array antenna has been presented as a candidate for use in wireless communications and Radio Fre- quency Identi¯cation (RFID). Each element in the array is a microstrip fed rectangular patch antenna designed to resonate at 2.4 GHz. Once the desired results were obtained for a single element, each element in the conformal cylindrical array has been then designed using the same dimensions and parameters. Modeling and performance evaluation of the array has been carried out using the commercially available electromagnetic software CST Studio SuiteTM 2009. Sim- ulations have been conducted to study the performance of the proposed conformal array as well as the e®ects of small radius cylinder on mutual coupling and the radiation pattern of the array. The cylindrical radii in consideration are of about one quarter wavelengths or slightly more. The radius of cylinder used in simulation is taken to be 0.24¸ and 0.32¸. Compared with the existing cylindrical conformal antenna, the proposed array antenna possesses a reduction in cylindrical structure radius with acceptable ominidirectionality and gain needed for wireless communications and RFID applications.
ANTENNA ARRAYS FOR MILLIMETER WAVE COMMUNICATION: A REVIEW
IRJET, 2023
Antenna arrays are groups of antennas that are used to transmit or receive radio signals. These arrays are made up of multiple individual antennas, also known as elements, that are positioned in a specific pattern to enhance the performance of the overall system. The main advantage of antenna arrays is that they can provide a beam of radio energy in a specific direction, which can increase the strength of the signal in that direction and reduce interference from other sources. This makes antenna arrays particularly useful for applications such as wireless communication, radio astronomy, and radar systems. There are different types of antenna arrays, including linear, planar, and circular arrays, each with unique properties and applications. The specific design of an antenna array depends on the desired frequency, radiation pattern, gain, and other requirements for the system. Antenna arrays are a key component in many modern communication systems and play a crucial role in maintaining reliable and efficient wireless connectivity.
A Circular-Shaped Antenna Array for Wide-Band Millimeter-Wave Application
Journal of Engineering Research and Reports
This paper presents a proposed Circular-shaped Antenna array for millimeter-wave application. The proposed antenna is designed to operate at mm-wave frequency of 17 GHz. Circular antennas give good return loss, and better gain and directivity. The main aim of using the array is to improve the gain of the antenna. Inset feed technique is used to design the antenna. The size and feed technique are determined by design formulas. The simulation results show a good return loss (reflection coefficient) of -55.297 dB which is way below the benchmark of 10dB and a bandwidth of 1.79 GHz (16.42 – 18.21 GHz). The gain and VSWR results are 8.684 dB and 1.0034 respectively at 17.29 GHz frequency. The CST software is used for the simulation.
2013 11th International Conference on Frontiers of Information Technology, 2013
In this paper, we have proposed the idea of designing a pyramidal conformal array antenna and install it on a moving vehicle. Uniform circular planar array is used and it is replicated to design pyramidal shape conformal array antenna. Single panel circular planar array at 72 degree and at 42 degree is used to build the array geometry of pyramidal shape conformal array. By using circular arrays at 42 degree and at 72 degree the 3-D radiation pattern of pyramidal conformal array antenna has been shown. By using same pyramidal conformal array antenna with different phase slopes the idea of tracking target in the air and on ground is introduced. The applications of pyramidal conformal phased array radar system in defense and in automotive industry are presented in the end.