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

Senega, S.; Lindenmeier, Stefan

doi:10.1109/eucap.2012.6206197

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…Test drives with a dashboardmounted diversity antenna have already shown a better performance than a rooftop-mounted standard single antenna [5].…”

Section: Diversity Antenna Set In a Single Side Mirrormentioning

confidence: 99%

“…Although the diversity system can be realized on a small printed circuit board (PCB) very strict size and cost constraints in the automotive industry make an integrated circuit preferable [5]. Prototypes of sub-circuits of such an IC have been designed and manufactured and printed circuit boards have been created to allow for measurements of the RF properties.…”

Section: Towards An Integrated Diversity Circuitmentioning

confidence: 99%

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Scan-phase antenna diversity for digital satellite radio (SDARS) in a single automotive side mirror

Senega

Kammerer

Lindenmeier

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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The reception of satellite digital audio radio services (SDARS) by vehicular receivers with a single antenna is usually only possible using a rooftop mounting position due to very strict specifications by the service provider. In cars where rooftop mounting is not an option alternative mounting positions have to be found. In most situations a single receiving antenna is not sufficient due to shadowing, attenuation, and strict size constraints leading to small ground planes in these positions.A single side mirror is used for mounting a diversity antenna set which is combined with a scan-phase diversity system in the work described in this paper. Signal recordings of such a scenario are analysed statistically and compared for test drive data of a shadowed and a non-shadowed antenna positioning due to the driving direction. Measurement results of the audio availability in real Rayleigh-fading scenarios show that the diversity system outperforms a single standard antenna on the rooftop of a car in this new configuration even though the car's shadowing of the antenna is considered.

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“…Test drives with a dashboardmounted diversity antenna have already shown a better performance than a rooftop-mounted standard single antenna [5].…”

Section: Diversity Antenna Set In a Single Side Mirrormentioning

confidence: 99%

Section: Towards An Integrated Diversity Circuitmentioning

confidence: 99%

Scan-phase antenna diversity for digital satellite radio (SDARS) in a single automotive side mirror

Senega

Kammerer

Lindenmeier

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

Self Cite

View full text Add to dashboard Cite

show abstract

“…This can be shown by a calculation of the SNR of the output signal from input signals with differing SNR values. A numerical evaluation of equation (15) for the critical noise power PN crit which meets equation (14) is sufficient for a range of − 7.7 dB ≤ P 1 /P 2 ≤ +7.7 dB. This corresponds to an amplitude ratio in the range of ( 2…”

Section: Influence Of Noise On Phase Calculationmentioning

confidence: 99%

“…In multipath fading environments the use of several receiving antennas in combination with a scan-phase antenna diversity system has been shown, reducing audio mutes significantly compared with single antennas [12–14]. In [15,16] measurements are presented which prove that even at critical mounting positions – e.g. on the dashboard or in a single side mirror – our scan-phase antenna diversity achieves excellent improvements of audio availability compared with single antenna systems.…”

Section: Introductionmentioning

confidence: 99%

Automotive antenna diversity system for satellite radio with high phase accuracy in low SNR-scenarios

Senega

Nassar

Lindenmeier

2018

Int. J. Microw. Wireless Technol.

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For a fast scan-phase satellite radio antenna diversity system a noise correction method is presented for a significant improvement of audio availability at low signal-to-noise ratio (SNR) conditions. An error analysis of the level and phase detection within the diversity system in the presence of noise leads to a correction method based on a priori knowledge of the system's noise floor. This method is described and applied in a hardware example of a satellite digital audio radio services antenna diversity circuit for fast fading conditions. Test drives, which have been performed in real fading scenarios, are described and results are analyzed statistically. Simulations of the scan-phase antenna diversity system show higher signal amplitudes and availabilities. Measurement results of dislocated antennas as well as of a diversity antenna set on a single mounting position are presented. A comparison of a diversity system with noise correction, the same system without noise correction, and a single antenna system with each other is performed. Using this new method in fast multipath fading driving scenarios underneath dense foliage with a low SNR of the antenna signals, a reduction in audio mute time by one order of magnitude compared with single antenna systems is achieved with the diversity system.

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“…1. The use of diversity antennas have improved the performance of wireless communication systems as reported in [15][16][17][18]. For switching elements in RF switch (including DPDT switch), researchers used either microelectro-mechanicals (MEMs) [10] or solid state elements such as PIN diode [19] and field effect transistor (FET) [13,14,20].…”

Section: Introductionmentioning

confidence: 99%

Fixed and Selectable Multiband Isolation of Double Pole Double Throw Switch Using Transmission Line Stub Resonators for Wimax and Lte

Shairi¹,

Zakaria²

2017

PIER B

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Abstract-A novel selectable multiband isolation of Double Pole Double Throw (DPDT) switch with switchable transmission line stub resonators has been proposed for applications of WiMAX and LTE in 2.3 and 3.5 GHz bands. In this paper, two DPDT switch designs are proposed; the first design is a fixed DPDT switch, and the second is a selectable DPDT switch. The second design allows selecting only one band and unselecting the other or selecting both of them. However, the first design does not allow so. The transmission line stub resonator used in this design is an open stub resonator with quarter wave of the electrical length. By using a simple mathematical model, the theory of the transmission line stub resonator was discussed where it can be cascaded and resonated at center frequencies of 2.3 and 3.5 GHz. Moreover, the cascaded transmission line stub resonators can be reconfigured between allpass and bandstop responses using discrete PIN diodes. The key advantage of the proposed DPDT with switchable transmission line stub resonators is a multiband high isolation with minimum number of PIN diodes. Therefore, the simulated and measured results showed less than 3 dB of insertion loss, greater than 10 dB of return loss and higher than 30 dB of multiband isolation in 2.3 and 3.5 GHz bands.

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

Cited by 12 publications

References 6 publications

Scan-phase antenna diversity for digital satellite radio (SDARS) in a single automotive side mirror

Scan-phase antenna diversity for digital satellite radio (SDARS) in a single automotive side mirror

Automotive antenna diversity system for satellite radio with high phase accuracy in low SNR-scenarios

Fixed and Selectable Multiband Isolation of Double Pole Double Throw Switch Using Transmission Line Stub Resonators for Wimax and Lte

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