A Metaresonator Inspired Dual Band Antenna for Wireless Applications

Abstract

2287from that part of the trajectory due to the occlusion from the buildings. Instead, signals from BS3 propagate via the identified reflector to this part of the trajectory. These parts of the trajectory are also marked with corresponding NLOS range, via the identified reflector in Fig. 4. Clearly, these markings coincide with the impulse response and explain the NLOS component. Note that the interruption and the NLOS component in Fig. 4 is due to that the van leaves the street with the occlusion for a detour, and when the van returns to the street with the occlusion, the NLOS component is back. Beyond doubt, it is the identified reflector that is active in the NLOS propagation during these segments. VI. CONCLUSIONS AND FUTURE WORKIn this communication we devise a method for estimating a map of NLOS reflectors for a mobile radio network based on multistatic SAR imaging. We apply the back-projection principle for the image creation which is a well known method from computerized tomography and also conventional SAR imaging. The obtained images give promising results where the reflectors are well-correlated with the large buildings detectable in the aerial map of the environment. Also, the possibility to extract which part of the trajectory contributed to different reflectors and from which base station is added. In this way a map where dominating reflectors are present can be built up.The applicability of the estimated reflectors is still unexploited. One possible application area is to consider the estimated reflectors and occlusions in position estimation, [15]. ACKNOWLEDGMENTThe evaluation data from the radio channel measurements has been kindly provided by J. Medbo, Ericsson. REFERENCES[1] M. A. Jensen and J. W. Wallace, "A review of antennas and propagation of channel and radio propagation models for wireless MIMO systems," EURASIP J. Wireless Commun. [3] 3GPP, "Spatial channel model for multiple input multiple output (MIMO) simulations," (TS 25.996). [4] J. Medbo, M. Riback, and J.-E. Berg, "Validation of 3GPP spatial channel model including WINNER wideband extension using measurements," presented at the IEEE Vehicular Technology Conf., 2006. [5] T. Fügen, J. Maurer, T. Kayser, and W. Wiesbeck, "Capability of 3-D ray tracing for defining parameter sets for the specification of future mobile communications systems," IEEE Trans.

A High-Directivity, Wideband, Efficient, Electrically Small Antenna System

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Dual Band Metamaterial Antenna For LTE/Bluetooth/WiMAX System

“…19 bigger in size than all of antennas. In addition, refs 6–8 and ref. 19 are cover the S- and C-bands as well as applicable for Bluetooth, WLAN, WiMAX applications.…”

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“…In 7 a V-shaped 27 × 24 mm 2 multi-band antenna is presented to operates at Bluetooth (2.40 to 2.48 GHz), WiMAX (3.30 to 3.70 GHz) and WLAN (5.15 to 5.35 and 5.73 to 5.85 GHz) applications. Further, a dual band antenna for 2.4/5.2 GHz WLAN operations was proposed, where dual band operation was achieved by utilizing stacking technique on a dog bone shaped 40 × 38 mm 2 dipole antenna 8 . In addition, a simple compact antenna designed for the LTE (698–960 MHz) and WWAN (1710–2690 MHz) bands applications in 9 .…”

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“…This antenna has the gain of 1 dB and 2.3 dB at 2.4 GHz and 5 GHz, respectively. With the use of stacking technique, a dual band antenna suitable for WLAN applications has been reported. The front to back ratio (FTBR) attained in the antenna is 10 dB.…”