Active Integrated Antenna Supporting Linear and Circular Polarizations

Khoshniat, Ali; Yekan, Taha; Baktur, Reyhan; Warnick, Karl F.

doi:10.1109/tcpmt.2016.2646484

Cited by 12 publications

(7 citation statements)

References 27 publications

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“…The performance of the proposed AIAs is compared with the earlier reported AIAs in Table 2. It can be seen that the proposed AIA-2 achieves more than 70% size reduction as compared to [13,14,21] with optimum P out and PAE value.…”

Section: Reconfigurable Aiamentioning

confidence: 95%

“…Later, PA output port matching is used to transform the antenna input impedance to the optimum impedance of the PA to achieve higher efficiency. Using this method a lot of advancements in the field of the AIA with superior characteristics have been proposed in [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. These AIAs provide good results at higher frequencies, but unable to achieve the compact size.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the microstrip patch antennas are used because of their ease of fabrication and integration [8][9][10][11][12][13][14][15][16]. Besides, the sector antennas [8][9][10], slots [13][14][15][16], log periodic [18], quasi-Yagi [19], monopole [20], circularly polarised antennas [13,21], differential feed [22] and UWB antennas [23,24] are proposed for AIA. In most of these antennas, the main drawback is unable to change the load impedance after fabrication due to their fixed design structure.…”

Section: Introductionmentioning

confidence: 99%

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Compact planar active integrated inverted‐F antenna with frequency reconfigurable capability

Gundumalla

Agrawal

Parihar

2018

IET Microwaves, Antennas & Propagation

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This study presents two compact high‐efficiency active integrated antennas (AIAs) working at 2.15 GHz. Both AIAs are realised by integrating the planar inverted‐F antenna (PIFA) at the back side of the class‐E power amplifier. In the first design, the antenna input impedance is transformed into an optimum impedance of the power amplifier. It achieves the maximum power added efficiency (PAE) of 68.6% with a total dimension of 0.36λ0 × 0.32λ0 × 0.03λ0 (λ0 is calculated at 2.15 GHz). In the second design, the antenna directly connected to the drain terminal of the power amplifier and offers a maximum PAE of 74% with a compact size of 0.21λ0 × 0.17λ0 × 0.04λ0, results in the size reduction of 59%. The novelty of the second design is it offers frequency reconfigurable nature by moving the shorting plate of PIFA without scaling the power amplifier and antenna, which can support Universal Mobile Telecommunications System (UMTS) (1920–2170 MHz), long term evolution (LTE)‐40 (2300–2400), and Worldwide Interoperability for Microwave Access (WiMAX) (2500–2690 MHz) frequency bands. The measured results demonstrate that the proposed reconfigurable AIA yields the maximum PAE of 64% at both frequencies 2.3 and 2.6 GHz.

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Section: Reconfigurable Aiamentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compact planar active integrated inverted‐F antenna with frequency reconfigurable capability

Gundumalla

Agrawal

Parihar

2018

IET Microwaves, Antennas & Propagation

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“…attractive active antenna technology for front-end miniaturization [13]- [16]. AIAs have also been proposed for other wireless systems [17]- [20], such as radar, imaging and satellite communications.…”

Section: Introductionmentioning

confidence: 99%

Seamless Integration of Active Antenna With Improved Power Efficiency

Liu

Wang

et al. 2020

IEEE Access

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Loss reduction to improve the power efficiency in active integrated antenna (AIA) is a key design drive. This paper first analyzes the loss mechanism in a convention AIA structure. A new integration scheme of a GaN power amplifier (PA) transistor with an antenna without using any output matching network (OMN) and harmonic tuning network (HTN) is then proposed to construct a seamlessly integrated AIA. This is achieved by a novel design of a slot antenna with optimized input impedance at its fundamental frequency as well as for harmonic tuning, which essentially absorbs the OMN and HTN functions in the conventional Class-F power amplifier design. By eliminating these passive networks between the transistor and the antenna, the associated insertion and mismatch losses as well as the overall circuit size are reduced. For verification, two prototypes are designed, fabricated and measured, one with the integrated design and the other with a conventional design for comparison. Both AIAs operate between 3.4 and 3.6 GHz. Experimental results show that the power-added efficiency (PAE) of the seamlessly integrated AIA is over 52% within the operating band. Compared with the conventional cascaded design of a PA and an antenna, the PAE is improved by 14.2%. INDEX TERMS Amplifier integrated antenna, active antenna, Class-F power amplifier, loss reduction, seamless integration.

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“…In an active integrated antenna (AIA) or rectifier, a radiating element is integrated with a non-linear circuit component such as a transistor or diode [3]. Because power amplifiers typically operate in the large-signal region, significant harmonic components will be generated by the inherent non-linearity of the transistors.…”

mentioning

confidence: 99%

Circularly polarised antenna with wide harmonics suppression by two angled C‐shaped structures

Sung

2019

Electron. lett.

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In this Letter, a circularly polarised (CP) antenna is proposed. The proposed antenna is realised by combining two angled C-shaped structures. By setting different widths (W L and W R) for the left and right angled C-shaped structures, respectively, an asymmetric structure is obtained. Therefore, the proposed antenna exhibits CP characteristics. From repeated simulation results, the authors find that the optimum ratio W L : W R to make the proposed structure operate as a CP antenna is 5: 8. Moreover, the measured reflection coefficient is lower than −2.4 dB within a stopband up to 12 GHz. This means that wide harmonics suppression (up to the fifth harmonic) is successfully achieved.

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Active Integrated Antenna Supporting Linear and Circular Polarizations

Cited by 12 publications

References 27 publications

Compact planar active integrated inverted‐F antenna with frequency reconfigurable capability

Compact planar active integrated inverted‐F antenna with frequency reconfigurable capability

Seamless Integration of Active Antenna With Improved Power Efficiency

Circularly polarised antenna with wide harmonics suppression by two angled C‐shaped structures

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