On the design of active Rx/Tx-diplexers with wide frequency spread

Publikationstyp
Conference Paper
Date Issued
2018-03
Sprache
English
Author(s)
Sieganschin, Anton  orcid-logo
Jaschke, Thomas  orcid-logo
Safi, Djamschid  orcid-logo
Jacob, Arne  
Institut
Hochfrequenztechnik E-3  
TORE-URI
http://hdl.handle.net/11420/2460
Start Page
315
End Page
318
Citation
German Microwave Conference, GeMiC: 315-318 (2018)
Contribution to Conference
11th German Microwave Conference, GeMiC 2018  
Publisher DOI
10.23919/GEMIC.2018.8335093
Scopus ID
2-s2.0-85049101456
Publisher
IEEE
This contribution deals with the performance analysis of an active diplexer for Rx/Tx integrated satellite communication antenna systems. To ensure a low noise figure of the receiver a passive diplexer with low insertion loss cascaded with a low noise amplifier (LNA) and a band-pass filter is used to separate Rx from Tx. This approach may lead to a relatively high Tx power level at the LNA input, which could even drive the latter into compression and affect the bit error rate (BER). This work analyzes the influence of phase and amplitude compression on the BER for different modulation schemes. Two-tone measurements are performed to characterize two different commercially available low noise amplifiers. The measured results are used to analyze the performance degradation for modulation schemes that are commonly used in Satcom. Maximum power levels of the parasitic Tx signal which prevent a significant rise in the BER are inferred. This information is useful for the design of diplexers.
DDC Class
600: Technik