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A Multi-band Body Wearable Antenna (MBWA) has been designed to cover six communications bands: SINCGARS band (30 MHz-88 MHz), Air & Marine band (116 MHz–174 MHz), UHF band (225 MHz–450 MHz), UHF-Public Safety band (450 MHz-512 MHz), UHF SATCOM band (225 MHz-318 MHz) and Soldier Radio Waveform (1–2 GHz). The MBWA can also be remoted from the radio and the soldier to enhance communications range...
Millimeter wave (mmWave) phased arrays have been demonstrated recently as the technology that enables 5G mobile's grand vision of high data rate and low latency, as well as provides a physical layer security stemming from mmWave's high propagation loss in the air interface. This paper explores the fundamental issues in both capacity and security/privacy of 5G wireless, and proposes a solution to enhance...
This paper presents the latest progress in demonstrating and characterizing the Traveling-Wave Antenna Array (TWAA) as a Multioctave Planar Phased Arrays (MPPA) capable of efficient wide-angle scan over multioctave bandwidth. (Beam Steering Network (BSN) and T/R module are not included here.) Four brass board TWAA panels having 16∗16 array elements were fabricated and tested for wide-angle scan up...
Full-fledged characterization of Traveling-Wave Antenna Array (TWAA) for wide-angle scan up to 60° off broadside over 2–12 GHz was first presented in 2015 IEEE Antenna Symposium by this author. Ironically, in the same Symposium, presentation by Neto and Cavallo stated that no “Connected Array” has yet reached a bandwidth of 2:1 due to poor cross-polarization higher than −10 dB. This paper shows that...
Theoretical and empirical characterizations of Multioctave Planar Phased Arrays (MPPA) are highly difficult, complex and costly; rooted in MPPA's complexity and its huge data and metrics that encompass large spatial and frequency domains. This paper presents theoretical and empirical characterizations as applied to an MPPA called Traveling-Wave Antenna Array (TWAA). The physical model has 16×16 elements,...
Conventional antenna designs for small platforms have been focused on using high-Q antennas, resulting in narrow bandwidth easily detuned. An approach using low-Q antennas miniaturized by using Real-time Adaptive Tuning (RTAT) is proposed. This new approach has been applied to the development of an Adaptive Miniaturized Ultrawideband Antenna (AMUA). Preliminary results are promising.
There are several leading challenges for planar phased arrays. First, for performance, it is difficult to achieve wide angle scan over a wide bandwidth. Second, their costs have been prohibitively high. The third challenge is to be thin and lightweight, suitable for mounting on various terrestrial and ex-terrestrial platforms and for ease of transportation. Consequently, Multioctave Planar Phased...
This paper highlights a class of thin planar Traveling-Wave Antennas and Arrays (both abbreviated as TWA) that have high efficiency (without lossy matching) and multioctave bandwidth. The single TWA has unidirectional or omnidirectional pattern; or both pattern types either simultaneously or switching between each other. The thin planar phased-array TWA is still in advanced development, but has shown...
Multioctave Planar Phased Arrays (MPPA) have advanced rapidly since 2000. Today, MPPA technology and its market needs appear to be nearing a point of convergence. This paper reviews the history of thin MPPAs, which exclude the Vivaldi antenna type, and presents modern planar Traveling-Wave Antenna (TWA) array as a thin MPPA. The differentiating features of modern planar TWA array from other thin MPPAs,...
This paper presents a new design of miniaturized integrated multifunction antenna for all terrestrial services over 0.7–7.0 GHz and satellite services over 1.1–2.4 GHz, covering essentially all radio technologies implemented now or on the drawing board for mobile communications. It has the advantages of small size, good form-factor, low cost, and aesthetic appeal.
Four-arm Traveling-Wave (TW) antennas, such as the planar 4-arm spiral type, are considerably superior in performance to their 2-arm counterparts, but generally require a complex, bulky, and expensive feed. This paper presents a novel simple low-cost feed approach. The technique is applied to a GNSS (Global Navigation Satellite System) antenna to achieve good performance, low cost, and simple structure.
Global Navigation Satellite System (GNSS) will in effect be fully deployed and operational in a few years, even with the delays in Galileo as a consequence of European Union's financial difficulties. The vastly broadened GNSS spectra, spread densely across 1146–1616 MHz, versus the narrow Global Positioning System (GPS) L1 and L2 bands, together with a constellation of over 100 Medium Earth Orbit...
Miniaturization of traveling-wave (TW) antennas by the slow-wave (SW) technique is shown highly promising over large instantaneous bandwidths, up to 10:1 for the unidirectional radiator and over 100:1 for the omnidirectional radiator. The technique enables a single multifunction antenna to handle virtually all terrestrial and satellite communications on an automobile, except for AM/FM radio.
This paper reports findings of a new ultra-wideband low-profile miniaturized 3-D (three-dimension) Traveling Wave (TW) omnidirectional antenna. Evolved from an ultra-wideband low-profile 2-D TW antenna, the 3-D TW antenna's size, and thus its weight and cost, were reduced by a factor of up to 6, that is, to only 1/6 that of the 2-D TW antenna. For such a large payoff, the 3-D TW technique only raised...
This paper demonstrates the high performance of a class of Universal GNSS Antennas based on the SMM antenna technology, as well as the major contributing factors of its performance limitations. As a result, highly satisfactory GNSS antennas with continually improving performance are being developed.
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