Telefonaktiebolaget Lm Ericsson (Publ)

Juandi Song

Yuhua Xiao

Ying Li

Lei Sun

Xueyuan Zhang

Junming Li

Jianlan Li

Yongbin Liu

Ningmin Liu

An RF filter, comprising a chassis () that defines a cavity, and a plurality of resonators () that are disposed in the cavity, wherein at least one resonator () comprises a body part () that extends in a first plane from a first end to an opposite second end along a first direction, an enlarged portion () that is provided at the second end and extends in the first plane along a second direction substantially perpendicular to the first direction so as to have a larger width in the second direction than the body part (), and a folded portion () that is formed by bending along a lateral edge of the enlarged portion () at an angle of about 90° so as to extend in a second plane substantially perpendicular to the the second direction. The folded portion () plays a role in forming a coupling of the resonator with an adjacent resonator. The body part (), the enlarged portion () and the folded portion () are made of a metal strip line, or a strip-line made of non-metal base with a metallized surface. The folded positions of two adjacent resonators can achieve desired coupling polarity.

RF filter and communication device having the same

A dielectric filter with a first radio frequency (RF) passband and a second RF passband, a radio unit, an antenna unit and a base station are disclosed. According to an embodiment, the dielectric filter () comprises a body () with a plurality of resonators () including a first resonator (), a second resonator () and a common resonator (). The common resonator () is coupled under its first resonance mode to the first resonator () to provide the first RF passband, and is coupled under its second resonance mode to the second resonator () to provide the second RF passband.

Dielectric filter, and AU, RU or BS having the same

An antenna unit, a radio unit, and a base station are disclosed. The antenna unit or the radio unit includes a plurality of filters, each having a respective radio frequency passband. At least one first filter is a CWG filter. The first filter is coupled to a second filter through a T-junction formed on an antenna board or a radio mother board.

AU and RU having CWG filters, and BS having the AU or RU

Embodiments of the disclosure provide an antenna filter unit and a radio unit. The antenna filter unit includes a radiation unit and a cavity filter coupled to the radiation unit. The radiation unit is arranged on an outer side of a wall of a cavity of the cavity filter. At least a part of the wall is also arranged as a reflection plate for the radiation unit. The radio unit includes the above-mentioned antenna filter unit and a radio circuit board. According to the antenna filter unit and the radio unit provided by embodiments of the disclosure, the number and volume of elements in a radio system are reduced, the degree of integration can be improved, the weight and installation space are reduced, and the costs are reduced.

Growing community of inventors

Beijing, China

Juandi Song