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This paper introduces a new ultra-wideband (UWB) printed circular dipole antenna having a filtering feature for rejecting the Wi-Fi band (4.9-5.9 GHz). UWB regulation in Europe [1] and Japan require the rejection or the avoidance of the 5 GHz Wi-Fi frequency band, but due to the very wide frequency band used by UWB technology, it is also particularly exposed to other systems disturbances. Some experiments...
Compact 2.4 GHz WiFi printed antennas based on a ldquotwistedrdquo slot approach have been designed and integrated on a board taking into account isolation requirements with an existing DECT module (1.9 GHz) for simultaneous WiFi and DECT operations. The obtained isolation between WiFi and DECT antennas of 30 dB has been ensured thanks to quarter wavelength slot stubs and a proper positioning of the...
This paper deals with an optimized architecture of an antenna and its RF Front End compliant with the IEEE 802.11a/b/g standards. It is based on the use of two printed end-fire antennas (Minard et al., 2005), where each antenna has separated accesses at 2.4 GHz and 5 GHz (Minard et al., 2005). These two accesses are sufficiently decorrelated and well matched on their respective bands. The use of separated...
This paper describes different measurements schemes for UWB antenna characterization in frequency domain as well as in time domain. The antenna measurements are well known in frequency domain, but the UWB technology introduces new requirements, especially in the time domain and then different measurement methods are necessaries. The time domain characteristics could be obtained through direct method...
Two dual band K/Ka polarizers have been designed, taking into account dimensions constraints for easiness of manufacturing and low cost production. The short polarizer (1.9lambda) presents very good performances, S11<-30 dB and axial ratio better than -0.5 dB in Rx and Tx frequency bands, for classical K/Ka frequency. The second dual band polarizer which is also very wide band in each Tx and Rx...
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