摘要:
A high-frequency noise detection antenna is provided with a fine coaxial line that includes a center conductor, an insulator provided so as to surround the whole periphery of the center conductor, and a ground shield provided so as to surround the whole periphery of the insulator, and in which a tip of the center conductor is exposed so as to protrude from the end of the insulator and the end of the ground shield, and an exposed ground shield provided so as to protrude from the end of the ground shield and surround a part in a circumferential direction of an exposed portion from which the center conductor protrudes.
摘要:
Reflection between a Mach-Zehnder modulator and a termination resistor is suppressed. An optical modulator includes a differential drive open collector driver IC, a differential drive semiconductor Mach-Zehnder modulator, and a differential terminator. The Mach-Zehnder modulator includes waveguides and a differential high-frequency line. The differential terminator includes a differential high-frequency line and termination resistors. The differential high-frequency line includes a capacity provided at least one of between signal lines and between a signal line and a ground line.
摘要:
A module includes an electrical wiring layer, an optical wiring layer, an electrical element, and an optical element. The electrical wiring layer includes electrical wiring lines for propagating electrical signals. The optical wiring layer includes optical wiring lines that are formed over the electrical wiring layer and are designed for propagating optical signals. The electrical element is formed on the electrical wiring layer and is electrically connected to the electrical wiring lines. The optical element is formed on the optical wiring layer and is optically connected to the optical wiring lines.
摘要:
An optical module includes: a Peltier module; an optical semiconductor element mounted on the Peltier module; and a driver that drives high-frequency lines of the optical semiconductor element. The optical semiconductor element includes: optical circuits providing a function of an optical interferometer and the high-frequency lines. Cooling performance of the Peltier module in a region in vicinity of the driver is higher than the cooling performance in other regions.
摘要:
A second substrate is formed on a first substrate. The second substrate includes a Mach-Zehnder modulation unit and a coplanar line. Further, the second substrate is formed on and bonded to the first substrate via an adhesive layer made of a non-conductive adhesive. The Mach-Zehnder modulation unit has an optical modulation region by an electro-optic effect. The coplanar line transmits a modulated signal to the optical modulation region.
摘要:
In a terminator, a midpoint electrode is provided between a first signal electrode and a second signal electrode, a first resistor is connected between the first signal electrode and the midpoint electrode, a second resistor is connected between the second signal electrode and the midpoint electrode, a first GND electrode is provided on a side opposite to the side where the first resistor is provided with the first signal electrode interposed therebetween, a second GND electrode is provided on the side opposite to the side where the second resistor is provided with the second signal electrode interposed therebetween, and capacitances in the terminator are formed between the first signal electrode and the midpoint electrode, between the second signal electrode and the midpoint electrode, between the first signal electrode and the first GND electrode, and between the second signal electrode and the second GND electrode.
摘要:
The present invention relates to an optical coupling/splitting device that realizes the splitting of a down-signal and the coupling of up-signals by the same optical device, and reduces coupling losses of the up-signal. An optical coupling/splitting device in the present invention comprises an optical coupling/splitting means for coupling a plurality of up-signals in a multi-mode for output and splitting a down-signal in a single mode for output, and a two-way optical propagation means for propagating the up-signal that is output from the optical coupling/splitting means in a multi-mode for output and propagate the down-signal in a single mode to be output to the optical coupling/splitting means.
摘要:
A high-frequency line connecting structure includes microstrip lines, and a connecting part which bends an extension direction of the line at a place where the microstrip lines are connected. Spaces from which the substrate is removed are formed on the inner peripheral side and the outer peripheral side of the connecting part. The total volume of the space on the inner peripheral side is smaller than the total volume of the space on the outer peripheral side.
摘要:
A high-frequency line structure includes: a high-frequency line substrate; ground lead pins fixed to ground ends provided in a bottom surface of the high-frequency line substrate; and signal lead pins fixed to signal line ends provided in the bottom surface of the high-frequency line substrate, wherein the signal lead pins are arranged between the ground lead pins, the signal lead pins have a structure in which each of the signal lead pins springs up in a direction toward a side on which the high-frequency line substrate is arranged, from a horizontal plane to which bottom surfaces of the ground lead pins pertains, and spring-up heights in the structure in which the respective signal lead pins spring up are substantially the same.
摘要:
A high-frequency line substrate is mounted on a printed circuit board. The printed circuit board includes a first high-frequency line. The high-frequency line substrate includes a second high-frequency line and lead pins that connect the first high-frequency line and the second high-frequency line. At the contact portions between the signal lead pins and the second high-frequency line of the high-frequency line substrate, and at the contact portions between the ground lead pins and the second high-frequency line of the high-frequency line substrate, the height of the ground lead pins from an upper surface of the printed circuit board is greater than the height of the signal lead pins.