Series-fed microstrip array antennas using a fractal structure with NP generator model

Suangun, Thanakarn; Mahatthanajatuphat, Chatree; Akkaraekthalin, Prayoot

doi:10.1109/apmc.2007.4554653

Cited by 4 publications

(1 citation statement)

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“…The second group features a number of branches from the main feeding line. Each branch is connected to an antenna element [6–9]. This paper belongs to the second category, in which we present new series‐fed antenna arrays tuned for operation at 26 GHz.…”

Section: Introductionmentioning

confidence: 99%

Sixteen‐by‐sixteen array of series‐fed aperture‐coupled microstrip patch antennas

Soliman

Vasylchenko

Volskiy

et al. 2011

Micro & Optical Tech Letters

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signal power range of À15 to À35 dBm. Consequently, output signal gain is measured for each value and pump laser current is adjusted to fix output signal gain level. Finally, fuzzy set is created by using these data. RESULTS AND CONCLUSIONThe results of experimental and FL-AGC models for À15 and À35 dB input signal powers are illustrated in Figure 5 in the signal power spectrum. The proposed FL-AGC uses the experimental dataset to form the FL based sets and the RB. The laser diode currents are predicted within the accuracy level more than 95%. A great harmony is observed between FL-AGC and experimental results.The proposed FL-AGC has simple, low cost, fast, highly stabilized, and accurate predictions, which does not require severe calculations. In addition, it is shown that this method is suitable for time-varying nonlinear complex systems online learning and self-adjustment of multi-input fuzzy systems with quick response. This response depends on the type of used DSPIC or PIC processor, and this value can be decreased about 10 ns, which is an appropriate value for conventional AGC circuits.The proposed FL-AGC single-stage EDFA has high dynamic range in input power and wavelength independent, which can be easily integrated into commercial WDM network systems. In point-to-point communication systems, such as satellite communication, antenna with high directivity is needed. The most common way of achieving this requirement is to arrange a number of single elements in an array configuration. The elements of the array are connected using a feeding network.There are two main types of feeding networks, namely: the corporate network and the series-feeding network. In the corporate-feeding network, there is a free equal path from the source to each of the radiating elements without passing through any other radiator [1]. On the other hand, in the series-fed array, the radiators are connected to the same feeding line, such that each element takes its own power and delivers the rest to next elements. The corporate-feeding network provides wider bandwidth than the series feeding. A unique feature of the series-fed network is that it allows for titling the main beam of the array via slightly varying the frequency. This range of titling is limited by the bandwidth of the elements and the feeding network. The series-fed antenna arrays can be further classified into two groups. In the first group, the feeding line is passing through the radiating elements [2][3][4][5], such that the antennas and the feeding line cannot be separated from each other. The second group features a number of branches from the main feeding line. Each branch is connected to an antenna element [6][7][8][9]. This paper belongs to the second category, in which we present new series-fed antenna arrays tuned for operation at 26 GHz. The proposed arrays are fabricated using Printed Circuit Board (PCB) technology. They have been characterized both theoretically and experimentally.Section 2 introduces the single radiating element on which the rest of arrays ...

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Section: Introductionmentioning

confidence: 99%