Philippe Chambelin

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This paper introduces a new ultra-wideband (UWB) printed circular dipole antenna with a hidden feed line. The specific feeding removes any radiation pattern disturbance generally met with this kind of antenna when fed with a coaxial or a microstrip line. The dipole is smaller than a quarter-wavelength unlike more traditional dipole. For a low cost(More)
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(More)
This work presents a low-cost, multi-beam antenna system, using a dielectric homogeneous lens as a focusing system. First, the design methodology of the antenna system, combining a homogeneous lens and its primary source, is described. Then, aberration phenomena generated by the lens are characterized. Finally, the primary source, used to correct these(More)
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(More)
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(More)
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(More)
This paper presents an innovative low cost solution to symmetrize E-plane and H-plane radiation patterns of conical waveguide horns. This solution takes benefit from the flexibility brought by foam technology. The design methodology, practical implementation and measurement results are presented.
This paper describes the main components of a low cost Ka/Ka feed for user terminals in a DVB-RCS system. A component by component design approach is presented and explained, and the first complete feed prototype is shown. The measurements are compared with simulations and very good agreement is obtained. All feed requirements are satisfied by the realized(More)
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(More)
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