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The Characteristic Mode theory of antenna analysis and design has received the attention of many researchers in recent years, because it provides a brand new way of looking at the problem of placing antennas on a given platform to achieve a desired radiation pattern; to reduce coupling between antennas in a MIMO design; to achieve a wideband performance compared to that of the original antenna, etc...
This paper presents the results of the antenna pattern measurements conducted on the Ice Cloud Imager 664 GHz feed horn at the ESTEC Sub-mmwave Scanner (SmS) in support to the ICI instrument of the MetOp-SG program. Very good agreement between simulations and measurements was obtained, both in the co- and cross-polar component. The measured peak directivity was 26.28 dBi ± 0.13 dB while the simulated...
Mobile communication service is widely penetrating to all the society as the key infrastructure. It is spreading beyond the conventional telephone service. Wide variety of social services including e-commerce, e-bank, navigation, location, healthcare, and education are offered on the network. It's not too much to say that people can never part with a smartphone as the most frequently use interface...
Future communication links will require higher data rates, multiple beams, and higher transmit/receive gains, in addition to smaller weight, cost, and power. With the growing interest for reduced size platforms and the requirement for ultra-wideband (UWB) performance to address multifunctionality, there is a strong need for UWB apertures to enable increased spectral efficiency, multifunctionality...
Several compact multiband antennas used for wireless communications will be presented in this lecture. Most of antennas are based on the slot and coplanar structures. The first antenna is a compact broadband printed slot antenna integrating with filters for band notching. The filters including I-shaped and inverse L-shaped narrow slits and L-shaped conductor strip are integrated in the proposed antenna...
Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
It is well known from the independent works of Keller, Deschamps, and Felsen, respectively, that an electromagnetic (EM) point current source positioned in complex space produces a beam wave field which is highly localized about its forward propagation axis. It is noted that the EM field of a complex source beam (CSB) constitutes an exact solution of Maxwell's equations, and it is simply obtained...
Metasurfaces constitute a class of thin metamaterials, which can be used from microwave to optical frequencies to create new electromagnetic engineering devices. They are obtained by a dense periodic texture of small elements printed on a grounded slab. Changing the dimension of the elements, being the sub-wavelength 2D-periodicity equal, gives the visual effect of a pixelated image and the electromagnetic...
New types of devices from electromagnetic (EM) technology and scientific area have emerged from its core in our society for a variety of purposes. EM radiation from these devices has caused growing concern about possible bio-effects and interference produced in the other devices. Our aim is to show the danger so that public can decide the risk they want to take. Quite similar to many phenomenon, it...
Satellite communications has recently introduced several new services in the recent past. These include local-channel broadcast for direct broadcast satellite service (DBS), high capacity K/Ka-band personal communication satellite (PCS) service, hosted payloads, mobile satellite services using very large deployable reflectors, high power hybrid satellites etc. All these satellite services are driven...
Massive or Full-Dimension MIMO antennas are promising for application in the next-generation mobile devices such as the smartphone for the fifth-generation (5G) communications to achieve multi-Gbps throughput. It has been recently demonstrated that with 12 antennas embedded in the limited space in the smartphone, 3.8-Gbps throughput can be obtained for 12 × 8 MIMO operation with 100-MHz bandwidth...
Discussed herein is a novel approach entitled reverse operation self-consistent evaluation (ROSE). Specifically, we applied ROSE for the treatment of weak-singular and hypersingular kernels in surface integral equations (SIEs) for the computation of electromagnetic (EM) scattering from perfect electrical conductors (PEC). In this paper, we restrict our discussion to the weak-singular and hypersingular...
In this paper, we propose a design method for a chassis MIMO antenna based on characteristic mode theory. Specifically, we provide a way to use a chassis with one axis of symmetry as a multiport MIMO antenna. The method utilizes a combination of characteristic mode and a mode-decoupling network, and suggests a way to design an inductive coupling element to excite specific characteristic modes while...
Antennas are important for digital data communication and radar applications. For various applications, special performances of antennas are required. In this paper various kinds of antenna, reflector antenna, phased array antenna, low profile antennas, and reconfigurable antennas, will be discussed for various applications.
With the advent of wearable sensors and internet of things (IoT), there is a new focus on electronics which can be bent so that they can be worn or mounted on non-planar objects. Moreover, there is a requirement that these electronics become extremely low cost, to the extent that they become disposable. The flexible and low cost aspects can be addressed by adapting additive manufacturing technologies...
By using optical single sideband modulation, we demonstrated instantaneous frequency measurement, which would be useful to monitor wideband radio signals with agile frequency change.
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