Antenna with optimized pattern for simultaneous reception of terrestrial signals and signals of geostationary satellites

Abstract

The link margin for satellite communication services targeting mobile users is tight. This leads to reception problems in areas with strong fading scenarios like urban areas or forested areas with dense foliage. In order to avoid loss of service in urban areas with week coverage by satellite signals, terrestrial repeaters are used. Therefore in the design of antennas for mobile reception of satellite services, an optimized characteristics for the satellite constellation, as well as an adequate coverage of the terrestrial repeaters has to be accounted for. In this paper an antenna with optimum shaped pattern for the satellite mode and adjustable gain for vertical polarization is investigated. Beside constraints regarding the radiation pattern, measurements concerning the dependence of the antenna on noise temperature and therefore the behavior in real noisy environments are carried out. A comparison with a conventional antenna shows the high performance of the new antenna in combination with a very low volume requirement.

Circularly Polarized Broadband Antenna With Circular Slot on Circular Groundplane

“…For applications with switchable RHCP and LHCP, an unavoidable mute occurs because a new synchronization to the digital data stream is needed after switching from one beam to the other. An antenna which receives both CP senses can avoid this problem and is used, for example, in satellite digital radio systems [18] and for the reception of terrestrial signals and signals of geostationary satellites [19].…”

Bandwidth Enhancement of Circularly Polarized Square Slot Antenna

“…So, CP antennas have been extensively studied and are well suited for applications in satellites, RADARs, GPS and mobile terminals [1][2][3][4]. Printed slot antennas [5][6][7][8] with wide radiating slot provide bidirectional radiation, i.e., simultaneous RHCP and LHCP, and have been used in satellite digital radio systems [5] and for the reception of terrestrial signals and signals of geostationary satellites [6]. They also provide wider bandwidth without increasing the antenna size and thickness along with greater manufacturing tolerances [7].…”

Circular Slot Antennas Using L-Shaped Probe for Broadband Circular Polarization

“…For applications with switchable RHCP and LHCP, an unavoidable mute occurs because a new synchronization to the digital data stream is needed after switching from one beam to the other. An antenna which could receive both CP senses could avoid this problem and is used, for example, in satellite digital radio systems [15] and for the reception of terrestrial signals and signals of geostationary satellites [16].…”