摘要:
A multimedia wall outlet (400) arranged to receive radio-frequency (RF) signals via a coaxial cable (408,100), the radio-frequency (RF) signals comprising multimedia signal components on their own frequency ranges. The wall outlet (400) comprises separating means (106) for separating said multimedia signal components to their own frequency ranges and a pi tubular filter (104,410) element arranged to provide a galvanic isolation between a ground of a shield of the coaxial cable (100,408) and a ground of the wall outlet, wherein said RF signals are conducted from the coaxial cable through said pi tubular filter element (104,410) to said separating means (106).
摘要:
A small-sized balance filter including an unbalanced terminal and two pairs of balanced terminals and having a low signal insertion loss is provided. An unbalanced terminal UB, a first balanced terminal Tx including a first terminal Tx1 and a second terminal Tx2, and a second balanced terminal Rx including a first terminal Rx1 and a second terminal Rx2 are provided. An unbalanced-side inductor L2 is inserted between the unbalanced terminal UB and the ground, first balanced-side inductors L31, L32, and L33 are inserted between the first terminal Tx1 and the second terminal Tx of the first balanced terminal Tx, second balanced-side inductors L41, L42, and L43 are inserted between the first terminal Rx1 and the second terminal Rx2 of the second balanced terminal Rx, and the unbalanced-side inductor L2 is electromagnetic-field-coupled to each of the first balanced-side inductors L31, L32, and L33 and the second balanced-side inductors L41, L42, and L43.
摘要:
In a filter arrangement comprising a frequency filter (F) that has a bad or non-ideal ground connection (GC1, 2, 3, 4, 5, 6, 7), the defects arising from bad ground are compensated by a capacitance (CC) coupled in parallel to the frequency filter. The value of the capacitance is chosen between 1 and 50 fF. The filter arrangement may be a receiving filter (RF) in a duplexer (DU).
摘要:
The present invention relates to a radio frequency filter comprising a coupler (310) for receiving an input signal through a first port, dividing the input signal, outputting the divided signals through second and third ports, combining signals received through the second and third ports according to phases of the signals, and outputting the combined signal through the first port or as an output signal of the RF filter through a fourth port; and a first filter unit (320) having a first port connected to the second port of the coupler and a second port connected to the third port of the coupler, for having a predetermined frequency filtering characteristic, wherein the first filter unit comprises a first filter (3210) having one end connected to the first port of the first filter unit and the other end that is opened, a second filter (3220) having one end connected to the second port of the first filter unit and a phase shifter (3230) having one end connected to the other end of the second filter and the other end that is opened.
摘要:
L'invention concerne un dispositif routeur multiports adapté à acheminer un nombre P supérieur ou égal à trois de canaux fréquentiels, depuis un nombre M de ports d'entrée vers un nombre N de ports de sortie, au moins un des deux nombres M ou N étant supérieur ou égal à deux, caractérisé en ce qu'il comporte au moins deux filtres (12, 14, 16, 18), chaque filtre comportant au moins deux résonateurs couplés, au moins un résonateur (Rs1, Rs2) étant commun à deux filtres différents, chaque port d'entrée et chaque port de sortie étant connecté directement à au moins un résonateur. Le dispositif routeur est apte à réaliser un routage dans lequel sur au moins un port de sortie est fourni un multiplexe de sortie comportant au moins un premier et un deuxième canal fréquentiel, parmi lesquels le premier canal fréquentiel est issu d'un premier multiplexe d'entrée fourni sur un premier port d'entrée et comportant ledit premier canal fréquentiel et au moins un autre canal fréquentiel acheminé vers un deuxième port de sortie du dispositif, et le deuxième canal fréquentiel est soit acheminé depuis un deuxième port d'entrée, soit, lorsque ledit premier multiplexe d'entrée comporte au moins trois canaux fréquentiels différents multiplexés, ledit deuxième canal fréquentiel est issu dudit premier multiplexe d'entrée, lesdits premier et deuxième canal fréquentiel étant disposés fréquentiellement de part et d'autre d'un troisième canal fréquentiel, ledit troisième canal fréquentiel étant routé vers un autre port de sortie.
摘要:
The present invention relates to a radio frequency filter, wherein a new form of a filter with characteristics different from a general filter is obtained by coupling a hybrid coupler with the general filter. As for the construction thereof, the radio frequency filter includes: a coupler which receives an input signal via a first port for distributing the same to be output to a second port and a third port, and synthesizes signals input via the second port and the third port according to corresponding phases for outputting the same to the first port or a fourth port as output signals of the radio frequency filter; and a first filter section connected to the second and third ports of the coupler respectively at the first and second ports thereof and having preset frequency filtering characteristics.