TY - JOUR 
A1 - Rogla, Luis
AU - Sancho-Ruiz-de-Castañeda, María Teresa
AU - Álvarez Melcón , Alejandro
AU - Sobrino, Santiago
T1 - Predistorted Ku-band rectangular waveguide input filter
Y1 - 2013
UR - http://hdl.handle.net/10317/3167
AB - In current Ku-band satellite telecommunication sys-
tems usually a working band selection is performed by means of
an input filter before the LNA. Moreover, in some architectures
more stringent selectivity requirements may be needed in order
to reject cross-coupled transmission power signals coming into
the reception chain, being necessary an spurious reject filter
after the LNA. On the other hand, depending on the near
rejection requirements implementing transmission zeros in the
filter response maybe needed. However, this also deteriorates in-
band response, affecting channels in the extremes of the reception
band. In-band response can be improved again by increasing
input filter quality factor using predistortion synthesis technique,
but at the cost of higher insertion loss and worse reflection
response. This work analyses how predistortion technique can be
applied to the design of Ku-band rectangular waveguide filters
with transmission zeros implemented through cross-couplings in
order to improve in-band performances. Moreover, undesired
effects arising from applying this technique are also discussed.
From authors knowledge, it is the first time this synthesis
technique is applied to rectangular waveguide filters with cross-
couplings.
KW - Teoría de la Señal y las Comunicaciones
KW - Microwave filters
KW - High selectivity
KW - Pre-distorsion
LA - eng
ER -