Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays

Research output: Contribution to conferencePaper, not in proceeding

Standard

Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays. / Lau, Buon Kiong; Bach Andersen, Jørgen.

2007. Paper presented at 3rd COST2100 Management Committee Meeting, 2007, Duisburg, Germany.

Research output: Contribution to conferencePaper, not in proceeding

Harvard

Lau, BK & Bach Andersen, J 2007, 'Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays', Paper presented at 3rd COST2100 Management Committee Meeting, 2007, Duisburg, Germany, 2007/09/10 - 2007/09/12.

APA

Lau, B. K., & Bach Andersen, J. (2007). Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays. Paper presented at 3rd COST2100 Management Committee Meeting, 2007, Duisburg, Germany.

CBE

Lau BK, Bach Andersen J. 2007. Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays. Paper presented at 3rd COST2100 Management Committee Meeting, 2007, Duisburg, Germany.

MLA

Lau, Buon Kiong and Jørgen Bach Andersen Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays. 3rd COST2100 Management Committee Meeting, 2007, 10 Sep 2007, Duisburg, Germany, Paper, not in proceeding, 2007.

Vancouver

Lau BK, Bach Andersen J. Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays. 2007. Paper presented at 3rd COST2100 Management Committee Meeting, 2007, Duisburg, Germany.

Author

Lau, Buon Kiong ; Bach Andersen, Jørgen. / Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays. Paper presented at 3rd COST2100 Management Committee Meeting, 2007, Duisburg, Germany.

RIS

TY - CONF

T1 - Impact of impedance matching on direction-of-arrival estimation of compact antenna arrays

AU - Lau, Buon Kiong

AU - Bach Andersen, Jørgen

PY - 2007

Y1 - 2007

N2 - Conventionally, the spacing between adjacent elements in an antenna array are set at half-a-wavelength in order to obtain maximum spatial resolution while avoiding spurious sidelobes. However, for antenna arrays that are implemented in a compact manner, the spacing between the adjacent elements can be significantly less than half-a-wavelength. The small spacing between the antennas results in strong mutual coupling between the antennas, which has been shown to affect the performance of array algorithms, through modifying the antenna pattern and reducing the antenna efficiency. Recently, impedance matching techniques have been proposed for multiple antenna systems for diversity and MIMO applications, in order to counteract the aforesaid coupling effects. In this paper, we study the impact of different impedance matching conditions on the Cramer-Rao bound performance of direction-of-arrival estimation of compact antenna arrays. We demonstrate that an appropriate matching network can drastically improve the CRB performance with respect to both 50 ohm termination and the case of ideal antenna arrays with no coupling. For example, a ten-fold reduction in RMSE was obtained with the multiport conjugate match for a two signal scenario and an antenna separation of 0.1*wavelength.

AB - Conventionally, the spacing between adjacent elements in an antenna array are set at half-a-wavelength in order to obtain maximum spatial resolution while avoiding spurious sidelobes. However, for antenna arrays that are implemented in a compact manner, the spacing between the adjacent elements can be significantly less than half-a-wavelength. The small spacing between the antennas results in strong mutual coupling between the antennas, which has been shown to affect the performance of array algorithms, through modifying the antenna pattern and reducing the antenna efficiency. Recently, impedance matching techniques have been proposed for multiple antenna systems for diversity and MIMO applications, in order to counteract the aforesaid coupling effects. In this paper, we study the impact of different impedance matching conditions on the Cramer-Rao bound performance of direction-of-arrival estimation of compact antenna arrays. We demonstrate that an appropriate matching network can drastically improve the CRB performance with respect to both 50 ohm termination and the case of ideal antenna arrays with no coupling. For example, a ten-fold reduction in RMSE was obtained with the multiport conjugate match for a two signal scenario and an antenna separation of 0.1*wavelength.

M3 - Paper, not in proceeding

T2 - 3rd COST2100 Management Committee Meeting, 2007

Y2 - 10 September 2007 through 12 September 2007

ER -