Electrically Small, Broadside Radiating Huygens Source Antenna Augmented With Internal Non-Foster Elements to Increase Its Bandwidth

Tang, Ming‐Chun; Shi, Ting; Ziolkowski, Richard W.

doi:10.1109/lawp.2016.2600525

Cited by 62 publications

(62 citation statements)

References 18 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The previously discussed cases have provided further insights into the electrically small, low-profile broadside radiating, Huygens source antennas [22][23][24]. The configuration of interest is shown in Figure 19.…”

Section: Multiple Nfrp Element Huygens Source Antennamentioning

confidence: 92%

“…On the other hand, recent designs have suggested that Huygens sources may be advantageous, particularly in regards to their FTBR values [20][21][22][23][24][25]. Consequently, it was explored whether or not the magnetic-based EZ antenna could be augmented with an electric-based NFRP antenna to achieve an electrically small Huygens source.…”

Section: D Magnetic Ez Antennamentioning

confidence: 99%

“…Moreover, even though a very narrow bandwidth occurs, which arises from the required overlap of two high Q resonators (i.e., the electrically small NFRP elements), it has been demonstrated that by introducing appropriate non-Foster reactances into the NFRP elements, interesting bandwidths can be obtained, while maintaining the desired Huygens source behavior [24]. Almost as low in profile as the patch antenna and lower in profile than the 3D magnetic EZ antenna, these Huygens source designs offer superior directivity performance in a significantly smaller package.…”

Section: Multiple Nfrp Element Huygens Source Antennamentioning

confidence: 99%

“…These include, for example, end-fire arrays [5][6][7][8], electromagnetic band-gap (EBG) structures [9], high impedance surfaces and artificial magnetic conductors [10][11][12][13], nearfield resonant parasitic (NFRP) elements [14][15][16], nonFoster circuit-augmented antennas [17], two-element NFRP antenna arrays [18,19], and Huygens sources [20][21][22][23][24][25]. The metamaterial-inspired NFRP antenna designs have led to the realization of many performance enhancements of compact systems.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The directivity of a compact antenna: an unforgettable figure of merit

Ziolkowski

2017

EPJ Appl. Metamat.

Self Cite

View full text Add to dashboard Cite

Abstract. When an electrically small antenna is conceived, designed, simulated, and tested, the main emphasis is usually placed immediately on its impedance bandwidth and radiation efficiency. All too often it is assumed that its directivity will only be that of a Hertzian dipole and, hence, its directivity becomes a minor consideration. This is particularly true if such a compact antenna radiates in the presence of a large ground plane. Attention is typically focused on the radiator and its size, while the ground plane is forgotten. This has become a too frequent occurrence when antennas, such as patch antennas that have been augmented with metamaterial structures, are explored. In this paper, it is demonstrated that while the ground plane has little impact on the resonance frequency and impedance bandwidth of patch antennas or metamaterial-inspired three-dimensional magnetic EZ antennas, it has a huge impact on their directivity performance. Moreover, it is demonstrated that with both a metamaterialinspired two-element array and a related Huygens dipole antenna, one can achieve broadside-radiating electrically small systems that have high directivities. Several common and original designs are used to highlight these issues and to emphasize why a fundamental figure of merit such as directivity should never be overlooked.

show abstract

Section: Multiple Nfrp Element Huygens Source Antennamentioning

confidence: 92%

Section: D Magnetic Ez Antennamentioning

confidence: 99%

Section: Multiple Nfrp Element Huygens Source Antennamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The directivity of a compact antenna: an unforgettable figure of merit

Ziolkowski

2017

EPJ Appl. Metamat.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Specifically, the Federal Communications Commission (FCC) of the US has recently (July 2016) designated the frequency band from 27.5 to 28. 35 GHz for 5G applications [2]. Another 5G breakthrough concept is the introduction of Device-to-Device (D2D) communications.…”

Section: Introductionmentioning

confidence: 99%

28 GHz Compact Omnidirectional Circularly Polarized Antenna for Device-to-Device Communications in the Future 5G Systems

Lin

Ziolkowski

Baum

2017

IEEE Trans. Antennas Propagat.

Self Cite

105

View full text Add to dashboard Cite

-An omni-directional circularly polarized (OCP) antenna operating at 28GHz is reported and has been found to be a promising candidate for Device-to-Device (D2D) communications in the next generation (5G) wireless systems. The OCP radiation is realized by systematically integrating electric and magnetic dipole elements into a compact disc-shaped configuration (9.23 mm 3 = 0.0076 λ at 28 GHz) in such a manner that they are oriented in parallel and radiate with the proper phase difference. The entire antenna structure was printed on a single piece of dielectric substrate using standard PCB manufacturing technologies and, hence, is amenable to mass production. A prototype OCP was fabricated on Rogers TM 5880 substrate and was tested. The measured results are in good agreement with their simulated values and confirm the reported design concepts. Good OCP radiation patterns were produced with a measured peak realized RHCP gain of 2.2 dBic. The measured OCP overlapped impedance & AR bandwidth was 2.2 GHz, from 26.5 to 28.7 GHz, an 8.0% fractional bandwidth, which completely covers the 27.5 to 28.35 GHz band proposed for 5G cellular systems.

show abstract

Non‐Foster Impedance Matching

Shih

Behdad

2021

Wiley Encyclopedia of Electrical and Electronics Engineering

View full text Add to dashboard Cite

Non‐Foster impedance‐matching circuits generate negative reactance‐to‐frequency slopes and allow for bypassing the gain‐bandwidth limitations of passive circuits, antennas, and metamaterials. Non‐Foster circuits can be implemented by many different active circuit topologies such as Linvill's negative impedance converters (NICs), Myers' NICs, Yanagisawa's NICs, and Hakim's NICs. The major applications of non‐Foster circuits include power amplifiers and electrically small antennas, where they are employed to provide wide impedance bandwidth. The key parameters to be considered in non‐Foster circuit design include stability, transmission efficiency, power efficiency, linearity, and noise. This article provides an overview of non‐Foster circuits and a design example with simulation and measurement results that validate the design concepts.

show abstract

Electrically Small, Broadside Radiating Huygens Source Antenna Augmented With Internal Non-Foster Elements to Increase Its Bandwidth

Cited by 62 publications

References 18 publications

The directivity of a compact antenna: an unforgettable figure of merit

The directivity of a compact antenna: an unforgettable figure of merit

28 GHz Compact Omnidirectional Circularly Polarized Antenna for Device-to-Device Communications in the Future 5G Systems

Non‐Foster Impedance Matching

Contact Info

Product

Resources

About