Abstract:
A microwave package for surface mount technology (SMT) integrates in its multilayer structure a waveguide interface comprising a microstrip to rectangular waveguide transition. The transition includes a patch at the end of a launching microstrip faced to a slot which is dug into a copper plate 0.5 mm thick, constituting the ground plane for the topmost microstrip layout and thermal sink for MMICs supported on it. The slot acts as an iris allowing propagation of fundamental TE 10 mode into a waveguide interface including a parallelepipedal cavity dug into the thickness of copper laminate under and around it starting from the bottom of the multilayer. The metallized cavity extends until the ground plane at the bottom with a cross-section preferably equally dimensioned as the external waveguide. The metallization of the cavity walls joins the ground plane at the bottom without breaking the continuity. Metallization of ground plane continues along the very narrow side walls determined by the thickness of multilayer. A metal lid is soldered along a metallized perimetrical frame on the upper layer. The lid is internally carved to obtain a cavity faced to the transition for reflecting back to the slot the power irradiated upwards. The ground plane on the bottom face includes the mouth of the internal waveguide tract, and the contacting beams for an external layout of the supporting PCB. The package is ready to be soldered to a PCB including in its turn a very short waveguide tract in its thickness between the mouth of the package and a metallic waveguide dug into the supporting mechanics (fig.10)
Abstract:
Circuit board (1) and method of producing thereof, the circuit board having a cavity for microstrip to waveguide transition means (2) defined by a hollow space on the walls of which a protection layer (21) is provided. A microelectronic substrate (33) is placed upon an adhesive film (31) adhered onto a surface of the circuit board (1), the adhesive film being pre-cut in selected areas (32) thereof providing openings therethrough. A metal layer (5) is disposed on the resulting structure, wherein a selected part (51) of the metal layer (5) present on a surface of microelectronics substrate (33), facing the hollow space defined by the cavity for microstrip to waveguide transition means (2) is removed.
Abstract:
Disclosed is a radio frequency circuit having a membrane structure and manufacturing method for the same. The radio frequency circuit has a circuit element formed on an insulating material plate having copper bonded on both surfaces or one surface thereof whereby a metal substrate having a hollow bore and the insulating material plate forming the circuit element are bonded together. The circuit element is mounted with an active element on which a lid having a partition wall is bonded for packaging. The hollow bore in the metal substrate, for forming a membrane structure, is formed by press-blanking. Because the metal substrate is not wet-etched, dimensions control can be easily, precisely made on a hollow bore region of the metal substrate. Furthermore, it is possible to shorten the working time on the hollow bore region.
Abstract:
According to some embodiments, an apparatus includes a circuit board made of polycrystalline diamond. The circuit board is formed by thermolysis of layers of a preceramic polymer. A plurality of tubes are formed within the circuit board and comprise a plurality of terminations at one or more surfaces of the circuit board. Each tube comprises a layer of graphene that is operable to permit each tube to conduct electrical current. Each layer of graphene is formed by thermolysis of the polycrystallilne diamond circuit board at a temperature greater than or equal to 900 degrees Celsius. The apparatus also includes a plurality of optical waveguides formed within the circuit board. Each optical waveguide comprises a core of polycrystalline silicon carbide surrounded by polycrystalline diamond. The polycrystalline diamond is formed by thermolysis of poly(hydridocarbyne) and the silicon carbide is formed by thermolysis of poly(methylsilyne).
Abstract:
A method for producing lighting devices, comprising at least one lighting module (20). The method comprises the stages of: - providing a plurality of lighting modules (20), wherein each lighting module comprises a first set of contacts placed at a first end of said lighting module (20) and a second set of contacts (204c, 204d) placed in corresponding positions at a second end of said lighting module (20); - connecting together a plurality of the lighting modules (20) for forming a series of lighting modules (20), wherein each lighting module (20a) is connected to the next lighting module (20b) by means of interconnecting elements (10) which connect the first set of contacts of each lighting module (20a) to the second set of contacts of the next lighting module (20b); and - cutting the series of lighting modules (20) in lighting devices comprising at least one lighting module (20), wherein the interconnecting elements (10) of the last lighting module of each lighting device are cut along their transverse axes. In particular, the interconnecting elements (10) comprise a base plate and a hollow portion in order to form female connectors when the interconnecting elements (10) are cut along their transverse axes.
Abstract:
The invention relates to a miniature microwave component, comprising: an MMIC microwave chip (100) encapsulated in an individual housing (222) for surface-mounting capable of operating at a frequency F0 much higher than 45 GHz; at least one contactless microwave access (124), by electromagnetic coupling, ensuring the transmission of coupling signals at a operating frequency F0. The component comprises a passive multilayer integrated circuit (220) having metallized layers and layers made of a dielectric material (140, 142, 144), a top surface (224), a metallized bottom surface (225), the metallized bottom surface comprising, on the side of the contactless microwave access (124), an opening (236) in the metallization through which electromagnetic waves can pass for coupling by the contactless microwave access and, between two layers of dielectric material, a metallized layer (146) having at least one electromagnetic coupling electric conductor (148) connected to the electronic components of the chip (100), said coupling electric conductor (148) being located next to the contactless microwave access (124) in order to ensure the transmission of microwave signals by electromagnetic coupling at the operating frequency F0. The invention can be used in automobile radars and high-bandwidth communications.
Abstract:
Die vorliegende Erfindung betrifft eine Leiterplatte mit einer ersten isolierenden Schicht (1b), auf der ein Hochfrequenzbauelement (17b) vorgesehen ist, wobei eine elektrische Leitung (9b) von dem Hochfrequenzbauelement (17b) durch die erste Schicht (1b) verläuft. Um die Qualität von elektrischen Signale zu verbessern, die von dem Hochfrequenzbauelement durch die erste Schicht hindurchgehen, und gleichzeitig eine ausreichende Stabilität der Leiterplatte zu gewährleisten, ist die erste Schicht (1b) dünn, und ist eine zweite isolierende Schicht (2b) zur Verstärkung der ersten Schicht (1b) vorgesehen, und ist das Hochfrequenzbauelement (17b) in einem Hohlraum (8b) in der zweiten Schicht (2b) aufgenommen.
Abstract:
Disclosed is a radio frequency circuit having a membrane structure and manufacturing method for the same. The radio frequency circuit has a circuit element formed on an insulating material plate having copper bonded on both surfaces or one surface thereof whereby a metal substrate having a hollow bore and the insulating material plate forming the circuit element are bonded together. The circuit element is mounted with an active element on which a lid having a partition wall is bonded for packaging. The hollow bore in the metal substrate, for forming a membrane structure, is formed by press-blanking. Because the metal substrate is not wet-etched, dimensions control can be easily, precisely made on a hollow bore region of the metal substrate. Furthermore, it is possible to shorten the working time on the hollow bore region.
Abstract:
A tunable dielectric structure includes a first layer of dielectric material, a second layer of dielectric material positioned adjacent to the first layer of dielectric material, with the second layer of dielectric material having a dielectric constant that is less than the dielectric constant of the first layer of dielectric material, and electrodes for applying a controllable voltage across the first dielectric material, thereby controlling a dielectric constant of the first dielectric material, wherein at least one of the electrodes is positioned between the first and second layers of dielectric material. The dielectric materials can be formed in various shapes and assembled in various orientations with respect to each other. The tunable dielectric structure is used in various devices including coaxial cables, cavity antenna, microstrip lines, coplanar lines, and waveguides.