Abstract:
An impedance matching stripline transition for microwave signals which are conducted from a stripline circuit on one laminate (2) to another laminate (4) through a number of intermediate laminates (3). The connection between an incoming stripline circuit (21) on one laminate (2) to the outgoing stripline circuit (41) on the other laminate is performed as a short coaxial line. The outer conductor of the coaxial line is formed by a number of through-plated holes (12, 13, 23, 33, 43) in horseshoe form around a central conductor of through-plated holes (24, 34). The outer conductor is connected with the earth plane (31, 11, 45) of the laminates. They serve simultaneously as suppressor of not desired modes in the microwave signals which is supplied to the transition via the conductor (21).
Abstract:
An assembly constituted by a laser module (1) and an input/output transmission line (2). The transmission line (2) is a coplanar waveguide (2b, 2c) formed on a flexible softboard substrate (2a).
Abstract:
The flat strip connection element may be provided with commercially available connections or couplings. Thanks to the optional pressure-sensitive coating (5), the flat connection may be quickly mounted. It is mainly suitable for leading through window and door rebates or underneath floor and wall coverings. It is also suitable for computer networks. The basic design of this flat strip connection element allows it to be used instead of coaxial cables or other cable types. The type of its plastic outer sheath (1) allows its colour to be adapted to the site of use. The copper sheath (2), which stabilizes the flat connection element, at the same time forms a shielding from connection to connection. The inner insulation (3) is determined during manufacture according to the destined use of the flat connection element. The single- or multiple-core leads (4) are sized according to the destined use.
Abstract:
A waveguide connection formed between a rectangular waveguide (11) and an elliptical waveguide (12) having a cutoff frequency and impedance different from those of the rectangular waveguide (11) comprises an inhomogeneous stepped transformer (10) having multiple sections (31,32,33) all having inside dimensions small enough to cutoff the first excitable higher order mode in a pre-selected frequency band, each section (31,32,33) of the transformer having an elongated transverse cross section which is symmetrical about mutually perpendicular transverse axes (X,Y) which are common to those of the waveguides (11,12), the dimensions of the said cross section increasing progressively from step to step in all four quadrants along the length of the transformer in the direction of both transverse axes (X,Y) so that both the cutoff frequency and the impedance of the transformer (10) vary monotonically along the length of the transformer (10).
Abstract:
A waveguide connection comprising the combination of a rectangular waveguide (11), an elliptical waveguide (12), having a cutoff frequency and impedance different from those of said rectangular waveguide (11), an inhomogeneous stepped transformer (10) joining said rectangular waveguide (11) to said elliptical waveguide (12), said transformer (10) having multiple sections (31, 32) all of which have inside dimensions (a,b) small enough to cut off the first excitable higher order mode in a preselected frequency band, each section of said transformer having a transverse cross-section defined by the equation: (2x/a) p + (2y/b) P = 1, where a is the dimension of the inside surface of said cross-section along the major transverse axis, b, is the dimension of the inside surface of said cross-section along the minor transverse axis, and x and y define the location of each point on the inner surface of the cross-section with reference to the coordinate system established by the major and minor transverse axes of the cross-section, respectively, , the value of said exponent p increasing progressively from the section (32) adjacent to said elliptical waveguide (12) to the section (31) adjacent to said rectangular waveguide (11), and the magnitudes of a and b changing progressively from step to step along the length of said transformer (10) so that both the cutoff frequency and the impedance of said transformer (10) change monotonically along the length of said transformer (10).
Abstract:
The structure (1) includes a conductive path (2) and a ground plane (3) applied to opposite faces of an insulating support (4). The ground plane (3) has parallel slots (6) placed under the conductive path (2) and transversely thereto.
Abstract:
To provide a microwave finline configuration which has no equivalent in unilateral finline, two different finline circuits extend in a common length of waveguide (1, 2), suitably on opposite major surfaces of a common dielectric substrate (3). A pair of Doppler mixers may have identical finline circuit patterns formed by sheet conductors (4 and 5, 6 and 7) with identical mixer diodes (10, 11) connected across their respective fin transmission lines, the finline circuits differing in the longitudinal positions of the diodes (10, 11), which positions are such as to provide respective beat-frequency output signals, via low-pass filters (12, 13), in phase quadrature.
Abstract:
An arrangement for transferring high frequency microwave signals between a cable and a microstrip printed circuit on a dielectric substrate is disclosed wherein a first microstrip track on a first substrate reactively couples with a second microstrip track on a second substrate, which second substrate is connected to an inner conductor of a coaxial cable and a ground plane associated with the first microstrip track is connected to the ground shielding of the coaxial cable. Since the microwave signals are reactively coupled by means of printed circuit tracks on a first dielectric substrate to printed circuit tracks on a second dielectric substrate, a non-contacting RF connection is established. This avoids the potential formation of intermodulation products which occur in metal - metal (galvanic) junctions. A further advantage arises in that a d.c. block is automatically incorporated within the arrangement, reducing the need for separate coupled lines, capacitors and the like. A method of transferring high frequency microwave signals between a cable and a printed circuit on a dielectric substrate is also disclosed.
Abstract:
The flat strip connection element can be equipped with the connectors or couplings currently available on the market. The optional self-adhesive coating (5) enables the connection to be fitted rapidly. Its most common applications are as rebate leadthroughs for windows and doors or under floor coverings and linings. A further use is for networking of computer systems. The basic design of this flat strip connection element enables it to replace coaxial or other types of cable. The plastic outer sheath (1) enables the connection element to be adapted to the colour of the surroundings. The copper sheath (2), which acts as a stabilizer for the connection element, serves also to form a shielding from connection to connection. The internal insulation (3) is determined during manufacture depending on the use of the flat strip connection. The single- or multiple-core leads (4) are dimensioned according to the application.