Control of Higher Harmonics and Their Radiations in Microstrip Antennas Using Compact Defected Ground Structures

Biswas, Subhendu; Guha, Debatosh; Kumar, Chandrakanta

doi:10.1109/tap.2013.2250240

Cited by 93 publications

(57 citation statements)

References 8 publications

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“…However, the use of input filters not only increases the rectenna size, but also introduces insertion loss that reduces system efficiency. Thus, it is suggested using the harmonic suppression antenna to replace the receiving antenna and the input filter …”

Section: Introductionmentioning

confidence: 99%

A wideband printed slot antenna with harmonic suppression

Qin

Chen

et al. 2018

Micro & Optical Tech Letters

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A wideband slot antenna with harmonic suppression is proposed to utilize the environment microwave energy. The antenna element is a printed narrow slot with an offset microstrip‐feed line to widen the operating band by generating the double resonance of similar frequencies. By adding a rectangular notch in the middle of slot element and grounding the microstrip terminal, its second‐order and third‐order harmonics are effectively suppressed. The experimental results of the prototype antenna show that the fractional bandwidth of its fundamental mode can reach 37.4%, while the antenna efficiencies of the second and third harmonics both are less than 23%. In the operating band the prototype antenna has the approximately omnidirectional radiation characteristic. This antenna structure also provides relaxed fabrication tolerances.

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Section: Introductionmentioning

confidence: 99%

A wideband printed slot antenna with harmonic suppression

Qin

Chen

et al. 2018

Micro & Optical Tech Letters

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“…For the case of that employed the method of H‐shaped DGS, narrow stop band was observed because of undesirable dips at 4.5 and > 6 GHz bands. As for the case in , although it has demonstrated a wide stop band between 3.2 and 12 GHz, two partial rings were required to be loaded side by side along the microstrip‐fed line, which results in requiring a long feeding line. Lastly, the case in was similar to the proposed one, however, its fundamental mode cannot excite CP radiation (so does and ), furthermore, the stop band of was between 3 and 8.6 GHz.…”

Section: Resultsmentioning

confidence: 99%

Annular-ring slot antenna designs with circular polarization radiation

Sim

Weng

Chang

et al. 2014

Int J RF and Microwave Comp Aid Eng

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The design of a microstrip‐fed annular‐ring slot antenna (ARSA) with circular polarization (CP) radiation is initially studied. To obtain CP radiation with broad 3‐dB axial ratio (AR) bandwidth that can cover the WiMAX 2.3 GHz (2305–2320 MHz, 2345–2360 MHz) and WLAN 2.4 GHz (2400–2480 MHz) bands, a novel technique of extending an inverted L‐shaped slot from the bottom section of the annular‐ring is proposed. To suppress the harmonic modes induced by the CP ARSA, the technique of integrating a defected ground structure into the annular‐ring slot is further introduced. From the measured results, 10‐dB impedance bandwidth and 3‐dB AR bandwidth of 44.86 and 9.68% were achieved by the proposed harmonic suppressed CP ARSA. Furthermore, average gain and radiation efficiency of ∼4.7 dBic and 71%, respectively, were also exhibited across the bands of interest. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:337–345, 2015.

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“…Out of the band, the measured gain is lower than -7 dBi from 2.8 to 10.5 GHz, demonstrating that the PIFA-fed patch antenna exhibits an excellent harmonic suppression performance over a wideband with the 2 nd , 3 rd and 4 th harmonics of the patch are significantly suppressed. Table III compares the proposed antenna in this paper with several other reported works with harmonic suppression capabilities in [6], [9]- [11]. The comparison mainly focuses on the orders of in-band responses, the order of harmonics suppressed and suppression performance.…”

Section: Harmonics Suppressionmentioning

confidence: 99%