Decoupling of Multiple Antennas in Terminals With Chassis Excitation Using Polarization Diversity, Angle Diversity and Current Control

Li, Hui; Lau, Buon Kiong; Ying, Zhinong; He, Sailing

doi:10.1109/tap.2012.2213056

Cited by 95 publications

(92 citation statements)

References 23 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For a dual-antenna system, it is given by (19) where is the total antenna efficiency of antenna . The term is the geometric mean (or arithmetic mean in decibel) of the antenna efficiencies, whereas reveals the equivalent power loss due to correlation [18]. The geometric mean of the antenna efficiencies can be measured directly, and the power loss due to correlation is estimated through calculating correlation coefficients.…”

Section: B Dipole Antenna Arraymentioning

confidence: 99%

Equivalent Circuit Based Calculation of Signal Correlation in Lossy MIMO Antennas

Lin

Lau

et al. 2013

IEEE Trans. Antennas Propagat.

Self Cite

View full text Add to dashboard Cite

Correlation coefficient of received signals across a pair of antennas is a key performance indicator for multiple-input-multiple-output (MIMO) systems. For multipath environments with uniform 3-D angular power spectrum, the signal correlation between two antennas can be exactly calculated from their 3-D radiation patterns. When radiation patterns are unavailable, a simplified approach that only requires the antennas' scattering parameters can be used instead. However, the simpler method assumes lossless antennas and thus only works well for antennas with high radiation efficiencies. To take into account the antenna loss, the idea of equivalent circuit approximation is used in this paper to analytically separate the lossy components (resistance or conductance) from the lossy antenna arrays, using known scattering parameters and radiation efficiencies. The simplified method using S parameters can then be applied to obtain the correlation coefficient of the equivalent lossless antennas. The effectiveness of the method has been verified on antennas operating at a single mode, such as dipole or patch at its lowest resonant frequency. Good results were also obtained for the measured case of a dual-antenna mobile terminal, consisting of a monopole and a PIFA.

show abstract

Section: B Dipole Antenna Arraymentioning

confidence: 99%

Equivalent Circuit Based Calculation of Signal Correlation in Lossy MIMO Antennas

Lin

Lau

et al. 2013

IEEE Trans. Antennas Propagat.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Won-Woo Lee 1 , Byung-Ho Rhee 2 > REPLACE THIS LINE WITH YOUR PAPER IDENTIFICATION NUMBER (DOUBLE-CLICK HERE TO EDIT) < 2 electric field become dominant component when we change the distance to GP① [5]. …”

Section: Characterization Of Performance Of a Mobile Mimo Antenna In mentioning

confidence: 99%

Characterization of Performance of a Mobile MIMO Antenna in Free Space

Lee

Rhee

2013

Antennas Wirel. Propag. Lett.

View full text Add to dashboard Cite

This paper presents an antenna design method for a dual antenna with high isolation for mobile stations (MS) and includes a verification method for improving the correlation performance of an MS that uses a proposed Multiple-Input Multiple-Output (MIMO) antenna by using MIMO OTA channel models. The large scale parameters for the MIMO OTA channel models are important because they determine the fixed geometrical parameters to be used for channel impulse response realization. The correlation performance of an MS has a strong relation to the Cross Polarization Discrimination (XPD) of the second branch antenna both numerically and experimentally. This study applies modern technology to implement MIMO antenna switch high isolation by selecting Band 5 to have low frequency, fabricated antenna samples that have several XPD values, thereby comparing their characteristics.

show abstract

“…Balanced antennas have been investigated previously [6,7], where good isolation has been achieved towards the unbalanced antenna placed next to the same printed circuit board (PCB). In this paper, balanced antenna is utilised in the proposed FE architecture, where very high isolation is needed between the three antennas.…”

Section: Introductionmentioning

confidence: 99%

Isolation between three antennas at 700 MHz: for handheld terminals

Bahramzy

Svendsen²,

Pedersen

2015

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

To address the antenna design challenges posed by many frequency bands, introduced with long-term evolution deployment, this study proposes the use of separate transmit (Tx) and receive (Rx) narrow-band antennas. In addition, a diversity Rx (Dx) antenna is needed for multiple-input multiple-output performance. Although the isolation between two antennas at low frequencies (700 MHz) is crucial for the successful implementation of 4G in handheld terminals, it becomes more challenging when considering isolation among three antennas (one Tx and two Rx antennas) at low frequencies. Hence, a method that improves the isolation between the ports of one Tx and two Rx antennas is presented here.

show abstract

Decoupling of Multiple Antennas in Terminals With Chassis Excitation Using Polarization Diversity, Angle Diversity and Current Control

Cited by 95 publications

References 23 publications

Equivalent Circuit Based Calculation of Signal Correlation in Lossy MIMO Antennas

Equivalent Circuit Based Calculation of Signal Correlation in Lossy MIMO Antennas

Characterization of Performance of a Mobile MIMO Antenna in Free Space

Isolation between three antennas at 700 MHz: for handheld terminals

Contact Info

Product

Resources

About