Novel combined scan-phase antenna diversity system for SDARS

Lindenmeier, Stefan; Barie, D.; Reiter, L.; Hopf, J.; Senega, S.

doi:10.1109/aps.2008.4619572

Cited by 11 publications

(4 citation statements)

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“…This means that the signal will be disturbed for 7.2 % of the time. Earlier measurements with a scan-phase antenna diversity system without parallel sniffing indicate that the influence of sniffing on the audio availability will actually be lower than 7.2% [4].…”

Section: Modifications For Parallel Sniffingmentioning

confidence: 99%

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Antenna module with integrated scan-phase antenna diversity system for SDARS

Senega

Lindenmeier

2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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A scan-phase multi-antenna diversity system is able to significantly improve reception performance of satellite digital audio radio systems (SDARS) in severe multipath propagation scenarios. The low hardware cost of such a system can only be achieved if a single level measurement circuitry is used for all antenna signals. In this paper the influences of switching between the antenna signals for level detection and the signal processing in the diversity system are studied for two different antenna diversity systems. A modification of the diversity hardware that avoids those influences is investigated. Measurements were performed to compare the modified and unmodified system in terms of audio availability.Test drives underneath dense foliage were conducted with a scan-phase antenna diversity system in combination with a diversity antenna set mounted on the dashboard of a car. This mounting position is of wide interest for example for convertibles, where the car roof is not available for the mounting of SDARS antennas. Measurement results show that the scan-phase antenna diversity system performs very well in such a disadvantageous antenna position. The diversity combination on the dashboard can compete with a roof-mounted patch antenna in the reception of geostationary satellite signals even with a closed roof.

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Section: Modifications For Parallel Sniffingmentioning

confidence: 99%

“…3. It utilizes switches and phase shifters for the selection as well as for the phase-aligned combination of up to three antenna signals [4].…”

Section: A System Descriptionmentioning

confidence: 99%

Antenna module with integrated scan-phase antenna diversity system for SDARS

Senega

Lindenmeier

2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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“…First diversity antenna system implementation for SDARS was reported in (Yegin et al, 2005) for a composite body vehicle, and a general system with multiple antenna locations in (Lindenmeier, Reiter, & Hopf, 2004;Lindenmeier et al, 2005) where fast switching diversity was implemented by changing active radiating elements within a single antenna structure. Scan phase diversity inspired from automotive FM diversity systems was proposed in (Heuer & Lindenmeier, 2009;Lindenmeier, Barie, Reiter, Hopf, & Senega, 2008). Conventional single-arm tuner with fast antenna switch based on bit error rates (BERs) was also implemented (Lindenmeier, Reiter, Barie, & Hopf, 2007).…”

Section: Introductionmentioning

confidence: 99%

On-glass automotive diversity antenna and LNA design for S-band satellite digital radio

Yeğin

2015

International Journal of Electronics

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To cite this article: Korkut Yeğin (2015) On-glass automotive diversity antenna and LNA design for S-band satellite digital radioSelection combining diversity system with antennas mounted on windshield and backlite of a vehicle is proposed for satellite digital audio radio applications. Standalone exterior mount antennas on metallic vehicles perform well for satellite digital audio radio applications, but for composite body vehicles or interior mount antennas, antenna performance becomes a real issue. Proposed on-glass two-antenna diversity is one solution for such applications. The antenna correlation is calculated using the S-parameters of the antennas and found to be very low due to many wavelengths separation between the antennas. Design of low noise amplifier, which has sub 1 dB noise figure and good P1dB due to strong cellular signals, is also detailed. A diversity receiver is described and ride tests are performed to assess the performance of the diversity system in real-time, under weak satellite signal environment which is regarded as the most challenging reception condition.

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“…Its drawback are the high hardware costs for separate cables and tuners which are needed for each antenna signal. A scan-phase antenna diversity system combines the advantages of low hardware costs and high signal quality improvement [2]. In order to calculate the phase-differences between the signals the signal levels have to be measured accurately.…”

Section: Introductionmentioning

confidence: 99%