Stacked reconfigurable circular patch antenna for adaptive MIMO systems

Piazza, Daniele; Capacchione, Massimiliano; Kountouriotis, John; D’Amico, M.; Dandekar, Kapil R.

doi:10.1109/iceaa.2009.5297270

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…The dual-antenna setup was successfully measured for capacity improvement. Piazza et al proposed a circular patch for pattern reconfiguration using different radiation modes of the patch, with a single element size of 0.37 wavelength (λ) [11]. Similarly, an Alford Loop design with boresight and monopole patterns was introduced in [12].…”

Section: Introductionmentioning

confidence: 99%

Design of Closely Packed Pattern Reconfigurable Antenna Array for MIMO Terminals

Lau

He³

2017

IEEE Trans. Antennas Propagat.

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Abstract-In this paper, a compact pattern reconfigurable dual-antenna array is designed at 2.65 GHz for MIMO terminal applications, such as laptops. Each antenna is composed of two layers, i.e., the monopole layer and the PIFA layer. By switching the PIN diodes on each layer, its radiation patterns can be varied between conical and boresight patterns. Two such identical antennas are placed side by side on a common ground plane for MIMO application, providing altogether four operating modes. The center-to-center separation between the antennas is 0.25 wavelength, to keep the overall array size compact. To facilitate an isolation of above 17 dB over all modes for this compact array, two decoupling techniques based on decoupling slits and shielding wall are effectively combined. The envelope correlation coefficient (ECC) of the far-field patterns in the four modes are below 0.05 in free space, and below 0.1 for most cases in indoor and outdoor scenarios. The only exception is the monopole-PIFA mode in the outdoor scenario, but the ECC is still below 0.3 for this case. The measured efficiencies of the antennas are between -1.7 dB (68%) to -0.7 dB (85%) for all modes. Therefore, good diversity and MIMO performances are expected for the proposed design.

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Section: Introductionmentioning

confidence: 99%

Design of Closely Packed Pattern Reconfigurable Antenna Array for MIMO Terminals

Lau

He³

2017

IEEE Trans. Antennas Propagat.

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“…However, some researchers use varactor diodes [9], MEMs [10], and optoelectronic switches in their antenna design to achieve reconfigurability functions. Stacked patches are consequently proposed in [11][12][13] to obtain frequency and pattern reconfigurability. The advantage of stacked antenna is that it produces high gain and bandwidth compared to single substrate layer.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Microstrip Stacked Array Antenna With Frequency and Pattern Characteristics

Ramli¹,

Ali²,

Yusof³

et al. 2014

PIER C

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Abstract-This paper presents a frequency and pattern reconfigurable stacked patch microstrip array antenna fed by aperture-coupled technique. The antenna consists of three substrate layers with radiating elements sorted at substrate layer 1 (top patches) and substrate layer 2 (bottom patches). The layers have different sizes to indicate different operating frequencies. On the ground plane, the four sets of two different aperture slot shapes (I-shaped and H-shaped) are used to transfer the wave and signal to particular radiating elements during the PIN diode switches configurations. The I-shaped slots are used to activate the bottom patches while the H-shaped slots are used to activate the top patches. Four PIN diode switches are placed at the feed line, positioned between the I-and H-shaped slots. Next, by changing the PIN diode switches configuration to ten cases, the proposed antenna has capabilities to change the operating frequencies and the pattern characteristics itself. The measured results of return loss, gain and radiation patterns have slightly shifted compared to the simulated results.

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“…Here, a ferrite substrate was used to reduce the size of the antenna. A reconfigurable multiport CPA (RCPA) was introduced in [11,12]. RCPA was also designed to generate two orthogonal radiation patterns.…”

Section: Introductionmentioning

confidence: 99%

On Performance of High-Efficiency Ferrite Meander Antenna (Hema) for Mimo Communications

Jayasooriya

Kwon²,

Syslo³

et al. 2013

PIER B

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Abstract-This paper presents a high-efficiency ferrite meander antenna (HEMA), which can be used to realize a 2 × 2 multipleinput-multiple-output (MIMO) communication system when it is used at both the transmitter and the receiver ends. This antenna is designed to operate at 2.45 GHz center frequency (f c ). It consists of two spatially separated half-cycle microstrip meander structures. Ferrite material is not used for the entire substrate, only beneath each meander structure. A standard FR-4 substrate is utilized as a system board. Impedance bandwidth and radiation patterns of the fabricated antenna are measured and compared with those of the simulation results. The −10 dB impedance bandwidth of the fabricated antenna is 262 MHz, whereas the simulated bandwidth is 235 MHz. According to the simulations, the gain and efficiency of the antenna are 2.2 dB and 81%, respectively. The efficiency of the antenna is confirmed by measurements. By using the simulated radiation patterns, correlation between the radiation patterns is calculated and employed in the generation of the channel matrix. Mutual impedance of the antennas and antenna efficiency are also included in the channel matrix, which in turn is used in bit error rate (BER) and ergodic capacity simulations. BER and ergodic capacity are utilized as performance metrics. The effect of antenna efficiency, mutual impedance of the antennas, and correlation between radiation patterns on system performance are presented.

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Stacked reconfigurable circular patch antenna for adaptive MIMO systems

Cited by 4 publications

References 6 publications

Design of Closely Packed Pattern Reconfigurable Antenna Array for MIMO Terminals

Design of Closely Packed Pattern Reconfigurable Antenna Array for MIMO Terminals

Reconfigurable Microstrip Stacked Array Antenna With Frequency and Pattern Characteristics

On Performance of High-Efficiency Ferrite Meander Antenna (Hema) for Mimo Communications

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