Design of microstrip non-foster leaky-wave antenna

Muha, Damir; Hrabar, Silvio; Krois, Igor; Bonic, Ivan; Kiricenko, Aleksandar; Zaluski, Davor

doi:10.1109/icecom.2013.6684720

Cited by 7 publications

(6 citation statements)

References 8 publications

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“…There are several both theoretical [40] and experimental studies [41][42][43][44] of this idea. The second example is a squint-free leaky wave (LW) antenna based on a transmission line periodically loaded with negative capacitors, proposed in [45] and later analyzed in [46,47]. This type of non-Foster antenna has been analyzed theoretically and numerically, while there is no experimental investigation reported so far.…”

Section: Active Metamaterials and Metamaterial-inspired Devicesmentioning

confidence: 99%

First ten years of active metamaterial structures with “negative” elements

Hrabar

2018

EPJ Appl. Metamat.

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Almost ten years have passed since the first experimental attempts of enhancing functionality of radiofrequency metamaterials by embedding active circuits that mimic behavior of hypothetical negative capacitors, negative inductors and negative resistors. While negative capacitors and negative inductors can compensate for dispersive behavior of ordinary passive metamaterials and provide wide operational bandwidth, negative resistors can compensate for inherent losses. Here, the evolution of aforementioned research field, together with the most important theoretical and experimental results is reviewed. In addition, some very recent efforts that go beyond idealistic impedance negation and make use of inherent non-ideality, instability, and non-linearity of realistic devices, are highlighted. Finally, a very fundamental, but still unsolved issue of common theoretical framework that connects causality, stability, and non-linearity of networks with negative elements is stressed.

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Section: Active Metamaterials and Metamaterial-inspired Devicesmentioning

confidence: 99%

First ten years of active metamaterial structures with “negative” elements

Hrabar

2018

EPJ Appl. Metamat.

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“…Different NFCs, including CMOS based NFC [12], diode based NFC [13] and amplifier based NFC [14], have been matched to various types of antennas, including the monopole antenna [15], loop antenna [16], Egyptian axe dipole antenna [17], microstrip leaky-wave antenna [18], and parasitic array [19], with mostly favorable results. The results show that the NFCs can truly enlarge the bandwidth of the antennas and maintain a stability condition at the same time.…”

Section: Introductionmentioning

confidence: 99%

Gain and Noise Performance of Non-Foster Matching Circuit for VLF Receiver Loop Antenna

Yan¹,

Liu²,

Dong³

et al. 2018

PIER M

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Abstract-Non-Foster matching circuits are those that can function as negative capacitors or inductors, and can thus overcome the gain-bandwidth limitation of passive matching circuits for antennas. This paper presents a non-Foster matching circuit (NFC) for a very low frequency (VLF) receiver loop antenna. The bandwidth of the antenna was improved by 383%, and the average gain was improved in most bands compared to a passive matching circuit (over 15-30 kHz). In contrast to circuits reported in other publications, the signal to noise ratio (SNR) of the passive matching network performed better than the non-Foster matching network. To analyze this phenomenon, a noise model was developed for the simplified balanced NFC, and noise analysis was conducted between the non-Foster and passive matching networks, which indicates that the non-Foster matching circuits cannot provide a better SNR performance than the passive matching circuits under low noise figure level receiver conditions.

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“…However, the beam squint is an undesired feature which limits the practical bandwidth in important applications such as highly-directive point-to-point telecommunication radio links. For this reason, many efforts have recently been placed to design high-gain scanning LWAs with reduced frequency-scanning sensitivity [6]- [15]. A. Neto [6], [7] proposed a nondispersive printed leaky slot line embedded in a circularly symmetric elliptical dielectric lens which focus the radiated fields to a constant beam direction over a wide frequency range.…”

Section: Introductionmentioning

confidence: 99%

Coupling Substrate-Integrated Waveguides to Increase the Gain Bandwidth of Leaky-Wave Antennas

Poveda-García

Casamichana

Goussetis

et al. 2018

IEEE Trans. Microwave Theory Techn.

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A novel technique to increase the pattern bandwidth of substrate integrated waveguide leaky-wave antennas (SIW LWAs) is proposed. By coupling several SIWs, it is shown that the gain at the desired angle can be kept stable across a wide frequency band. A systematic design methodology based on a simple transverse equivalent network is presented. Practical coupled-SIW designs with gain exceeding 10dB and pointing at 30º in the 15 GHz band, are reported to validate the theory. Simulated and experimental results demonstrate an enhancement of the halfpower gain bandwidth from 2.5% (380 MHz) in the single-SIW design to 9% (1360 MHz) for a LWA composed of three coupled SIWs.

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Design of microstrip non-foster leaky-wave antenna

Cited by 7 publications

References 8 publications

First ten years of active metamaterial structures with “negative” elements

First ten years of active metamaterial structures with “negative” elements

Gain and Noise Performance of Non-Foster Matching Circuit for VLF Receiver Loop Antenna

Coupling Substrate-Integrated Waveguides to Increase the Gain Bandwidth of Leaky-Wave Antennas

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