Frequency reconfigurable stepped impedance dipole antenna for wireless applications

Mani, Manoj; Moolat, Remsha; Abdulrahiman, Shameena V.; Viswanathan, Anila P.; Vasudevan, K.; Mohanan, Pezholil

doi:10.1016/j.aeue.2019.153029

Cited by 8 publications

(11 citation statements)

References 22 publications

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“…for each center frequency in the tuning range, therefore it is represented as the overlapped spectrum, where, under this notion, the FBW is represented as a range of available bandwidth when the antenna is tuned. actors [7], [74], [104]- [108], as shown in Table 6. Row et al [107] proposed a right hand circularly polarized square patch with 4 varactor diodes connected to the center of the four edges of the patch, as illustrated in Fig.…”

Section: Frequency Reconfigurable Antennasmentioning

confidence: 99%

“…The design accomplished a TR of 44.8 %, with a FBW ranging from 4% to 9.09%, leading to a significant improvement in the FBW, with a FBWC of 127.25%. Varactors were used to implement frequency reconfigurability in the 4G spectrum with relatively more designs than the ones in which PINs are employed [7], [104], [106]- [108]. The proposed designs in [106]- [108] have opted for similar frequency ranges around 2.4 GHz, using two, four and eight varactors, respectively.…”

Section: Frequency Reconfigurable Antennasmentioning

confidence: 99%

“…Varactors were used to implement frequency reconfigurability in the 4G spectrum with relatively more designs than the ones in which PINs are employed [7], [104], [106]- [108]. The proposed designs in [106]- [108] have opted for similar frequency ranges around 2.4 GHz, using two, four and eight varactors, respectively. The designs support multiple services such as WLAN, Bluetooth and LTE.…”

Section: Frequency Reconfigurable Antennasmentioning

confidence: 99%

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Electrical Reconfigurability in Modern 4G, 4G/5G and 5G Antennas: A Critical Review of Polarization and Frequency Reconfigurable Designs

2023

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This paper presents a critical review of modern 4G, 4G/5G, and 5G antennas, which employ PIN diodes and Varactors for polarization or frequency reconfiguration. For the reviewed 4G and 5G polarization reconfigurable antennas, a new parameter named spectrum utilization "AR/S 11 B.W." is defined for the first time to predict the shared spectrum between the impedance bandwidth and the axial ratio bandwidth for circularly polarized antennas. The calculated spectrum utilization for many designs revealed that the majority of implementations failed to achieve full utilization of the available bandwidth. Besides, employing multiple PIN diodes is shown useful in improving the spectrum utilization and in supporting multiple polarization states. For the reviewed 4G, 4G/5G and 5G frequency reconfigurable antennas, the focus is mainly on comparing the available tuning range, fractional bandwidth and the Fractional Bandwidth Change (FBWC) upon tuning. The latter parameter, is defined and calculated in this work to measure the change in the FBW upon tuning. Utilizing multiple Varactors is shown promising in improving a 4G antenna's fractional bandwidth, while combining Multiple PINs and Varactors in one design is found efficient in improving the FBWC and the tuning range in the 5G spectrum.

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Section: Frequency Reconfigurable Antennasmentioning

confidence: 99%

Section: Frequency Reconfigurable Antennasmentioning

confidence: 99%

Section: Frequency Reconfigurable Antennasmentioning

confidence: 99%

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Electrical Reconfigurability in Modern 4G, 4G/5G and 5G Antennas: A Critical Review of Polarization and Frequency Reconfigurable Designs

2023

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“…The two frequency bands are quasiindependently controllable. Each monopole antenna is excited with a conventional 50 Ω microstrip transmission line whose dimensions were calculated using Equations (1) and (2). We left a gap of 1 mm to insert a varactor diode between the main radiator and an Lshaped parasitic radiator, as shown in Figure 1A.…”

Section: Antenna Designmentioning

confidence: 99%

“…With the development of modern reconfigurable RF frontends, continuously frequency-reconfigurable antennas have attained substantial heed because of their peculiar property to adjust their resonant frequency according to whatever frequency band is available and to the user's requirements, thus enhancing the spectrum efficiency. 1,2 Moreover, the continuous frequency-reconfigurable antennas are economical and simple to integrate with other RF front-end devices and have a low profile. In addition, these antennas can perform in wideband or narrow band and mono-band or multiband operation, according to the state of the reconfigurable network.…”

Section: Introductionmentioning

confidence: 99%

Varactor diode‐baseddual‐bandfrequency tunable multiple‐input multiple‐output antenna

Smida

Iqbal

Selmi

et al. 2020

Int J RF Microw Comput Aided Eng

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A microstrip feed line-based continuous frequency-tunable dual-band multiple-input multiple-output (MIMO) antenna is proposed in this article. The proposed antenna comprises four hook-shaped radiators placed orthogonally to one another. The overall dimensions of the antenna are 45 × 45 × 1.6 mm 3 (0.77λ g × 0.77λ g × 0.027λ g [where λ g is the guided wavelength at the lower tunable resonant frequency]). The proposed antenna operates at dual-band, while tunability in the resonant frequencies is achieved by connecting varactor diodes with the radiating patches. The lower resonant band of the antenna can be tuned from 2.45 to 2.83 GHz (with the isolation of more than 17 dB in the whole operating band) and the upper frequency band is tunable from 5.14 to 6.3 GHz (with the isolation of more than 22 dB in the whole operating band). The properties of the antenna such as reflection coefficients, mutual couplings, radiation patterns, channel capacity losses, and multiplexing efficiencies are verified by measuring the fabricated prototype. The envelope correlation coefficient of the antenna is <0.11 for the lower frequency band and is <0.16 for the higher frequency band for all tuning cases. The proposed antenna is suitable for use in compact multiband MIMO applications because of its small size, dual-band characteristics, continuous frequency tuning capability, and good MIMO parameters.

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Frequency and pattern reconfigurable rectangular patch antenna using single PIN diode

Palsokar¹,

Lahudkar²

2020

AEU - International Journal of Electronics and Communications

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Frequency reconfigurable stepped impedance dipole antenna for wireless applications

Cited by 8 publications

References 22 publications

Electrical Reconfigurability in Modern 4G, 4G/5G and 5G Antennas: A Critical Review of Polarization and Frequency Reconfigurable Designs

Electrical Reconfigurability in Modern 4G, 4G/5G and 5G Antennas: A Critical Review of Polarization and Frequency Reconfigurable Designs

Varactor diode‐baseddual‐bandfrequency tunable multiple‐input multiple‐output antenna

Frequency and pattern reconfigurable rectangular patch antenna using single PIN diode

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