Abstract:
Embodiments provide a novel fabrication method and structure for reducing structural weight in radio frequency cavity filters (230, 330, 430) and radio subsystems such as antennas (502) and filters (230, 330, 430). The novel structures are fabricated by electroplating the required structure over a mold, housing, or substrate. The electrodeposited composite layer may be formed by several layers of metal or metal alloys with compensating thermal expansion coefficients. The first or the top layer is a high conductivity material or compound such as silver having a thickness of several times the skin-depth at the intended frequency of operation. The top layer provides the vital low loss performance and high Q-factor required for such filter structures while the subsequent compound layers provide the mechanical strength.
Abstract:
RF 필터의 공진기 제조 방법 및 이를 구비한 RF 필터가 개시된다. 개시된 방법은, 상업적으로 입수 가능한 파이프를 준비하는 단계(a); 상기 파이프를 미리 설정된 길이로 커팅하는 단계(b); 및 상기 미리 설정된 길이로 커팅된 파이프를 공진기로 사용하여 RF 필터 하단에 결합하는 단계(c)를 포함한다. 개시된 방법에 의하면, RF 캐비티 필터의 공진기 제조 비용을 절감시킬 수 있으며, 원재료의 손실을 가져오지 않고 제조 시간을 줄일 수 있는 장점이 있다.
Abstract:
A re-entrant resonant cavity (12) includes a first metallized molded plastic component (18), which comprises a re-entrant stub (17), an end wall (14) and a cylindrical side wall (13). The component (18) is surface mount soldered to a metallized PCB substrate (19). A rostrum (24) is located facing the end face (21) of the stub (17) to define a capacitive gap (22) with it. The end face (21) of the stub (17) and the rostrum (24) are configured such that relative rotation between them changes the profile of the gap (22) and hence the gap capacitance. By suitably locating the two parts during manufacture, a particular capacitance may be chosen to give a desired resonance frequency from a selection available depending on the relative angular position of the stub (17) and rostrum (24). In another cavity, the rostrum is replaced by an etched metallization layer of a printed circuit board.
Abstract:
Embedded, coupled, shaped waveguide resonators having conductive walls sandwiched between two fired green tape stacks, said conductive walls having apertures therein whose size and location determine the degree of coupling. These waveguides are made by forming openings in a first green tape stack (12), defining walls (18) and apertures (19) therein, mounting a second green tape stack (23) having a conductive layer (20) thereon thereover and firing the assembly. E-plane probes (22) are inserted in openings (14) in the second green tape stack and connected to microstrip transmission lines (24) on an external surface of this green tape stack.
Abstract:
A dielectric resonator consisting of a pole-like body (40) having a through hole (50). An electrode (80) having a strong bonding force is provided on the surface of the body (40) and on the inner peripheral surface of the through hole (50), in order to improve Q-characteristics and to enhance the produceability thereof. For this purpose, the surface of the body (40) is mechanically coarsened and then the whole body is chemically etched. The body (40) coarsened in two steps is then fitted to a support pin (110) of a rotary member (100) installed vertically or tilted in a plating solution (26) in order to plate the electrode (80).
Abstract:
본 발명은 캐비티 구조를 가진 무선 주파수 필터로서, 내부가 중공이고, 외부와 차단되는 캐비티를 갖는 함체와, 상기 함체의 내부 중공에 위치하는 공진소자를 포함하고, 상기 함체에는, 상기 공진소자의 길이방향 선단면과 마주보는 함체 내면과의 간격이 외부의 압력에 의해 조절되기 위한 주름 구조가 형성된 것을 특징으로 한다. 따라서, 더욱 소형 및 경량화가 가능하며, 튜닝 스크류 및 고정용 너트의 체결 구조를 채용하지 않고서 주파수 튜닝이 가능하도록 설계되어, 간단하며, 단순화된 구조를 가질 수 있다.
Abstract:
Embodiments in the invention disclose a method for manufacturing resonant poles, which comprises the following steps: homogeneously mechanical mixing 88wt%-98wt% Fe-Ni alloying powder, 1wt%-8wt% carbonyl iron powder and 1wt%-8wt% carbonyl nickel powder mechanically; shaping the mixture powders after being homogeneously mixed into green body of the resonant poles; and continuously sintering and heating by annealing the green body of the resonant poles. Also, embodiments in the invention provide a kind of resonant poles and cavity filters. The advantages of using the method for manufacturing resonant poles of the embodiments in the invention is: the production efficiency being greatly improved, the raw material loss being cut down in a large degree, and the alloying gradients agglomeration of the resonant poles of the embodiments in the invention being reduced to a minimum, big and uneven defects of the microstructures being eliminated, hence the performance index and stability of the corresponding products being increased.
Abstract:
A re-entrant resonant cavity (12) includes a first metallized molded plastic component (18), which comprises a re-entrant stub (17), an end wall (14) and a cylindrical side wall (13). The component (18) is surface mount soldered to a metallized PCB substrate (19). A rostrum (24) is located facing the end face (21) of the stub (17) to define a capacitive gap (22) with it. The end face (21) of the stub (17) and the rostrum (24) are configured such that relative rotation between them changes the profile of the gap (22) and hence the gap capacitance. By suitably locating the two parts during manufacture, a particular capacitance may be chosen to give a desired resonance frequency from a selection available depending on the relative angular position of the stub (17) and rostrum (24). In another cavity, the rostrum is replaced by an etched metallization layer of a printed circuit board.