摘要:
Provided is a microwave module having a converter for improving transmission characteristics in a millimeter-wave band. When a microstrip transmission line and a conductor-backed coplanar waveguide (CBCPW) transmission line are connected by wire bonding, a change in impedance caused by wire bonding and an abrupt change in electric field components between the two transmission lines are reduced by the converter. Therefore, insertion loss and return loss are reduced, and transmission characteristics in a millimeter-wave band are improved.
摘要:
Provided are a transistor of a semiconductor device and a method of fabricating the same. The transistor of a semiconductor device includes an epitaxial substrate having a buffer layer, a first silicon (Si) planar doped layer, a first conductive layer, a second Si planar doped layer having a different dopant concentration from the first Si planar doped layer, and a second conductive layer, which are sequentially formed on a semi-insulating substrate; a source electrode and a drain electrode formed on both sides of the second conductive layer to penetrate the first Si planar doped layer to a predetermined depth to form an ohmic contact; and a gate electrode formed on the second conductive layer between the source electrode and the drain electrode to form a contact with the second conductive layer, wherein the gate electrode, the source electrode and the drain electrode are electrically insulated by an insulating layer, and a predetermined part of an upper part of the gate electrode is formed to overlap at least one of the source electrode and the drain electrode. Therefore, a maximum voltage that can be applied to the switching device is increased due to increases of a gate turn-on voltage and a breakdown voltage, and decrease of a parallel conduction component. As a result of this improved power handling capability, high-power and low-distortion characteristics and high isolation can be expected from the switching device.
摘要:
A semiconductor package is provided. The semiconductor package includes a package body, a plurality of semiconductor chips, and an external connection terminal. The package body is stacked with a plurality of sheets where conductive patterns and vias are disposed. The plurality of semiconductor chips are inserted into insert slots extending from one surface of the package body. The external connection terminal is provided on other surface opposite to the one surface of the package body. Here, the plurality of semiconductor chips are electrically connected to the external connection terminal.
摘要:
Provided are a compound semiconductor device and a method of manufacturing the same. The semiconductor device includes: a substrate including a first region and a second region; a transistor including first to third conductive impurity layers stacked on the substrate of the first region; and a variable capacitance diode spaced apart from the transistor of the first region and including the first and second conductive impurity layers stacked on the substrate of the second region.
摘要:
Provided is an inductor. The inductor includes a first to a fourth conductive terminals formed in one direction within a semiconductor substrate, a first conductive line formed on one side of the semiconductor substrate and electrically connected to the second and third conductive terminals interiorly positioned among the first to fourth conductive terminals, a second conductive line formed on the one side of the semiconductor substrate and electrically connected to the first and fourth conductive terminals exteriorly positioned among the first to fourth conductive terminals, and a third conductive line formed on the other side of the semiconductor substrate and electrically connected to the first and third conductive terminals among the first to fourth conductive terminals.
摘要:
Provided is a power amplifier device. The power amplifier device includes: a cutoff unit cutting off a direct current (DC) component of a signal delivered from a signal input terminal; a circuit protecting unit connected to the cutoff unit and stabilizing a signal delivered from the cutoff unit; and an amplification unit connected to the circuit protecting unit and amplifying a signal delivered from the circuit protecting unit, wherein the amplification unit comprises a plurality of transistors connected in parallel to the circuit protecting unit and the circuit protecting unit comprises resistors connected to between bases of the plurality of transistors.
摘要:
A semiconductor package is provided. The semiconductor package includes a package body, a plurality of semiconductor chips, and an external connection terminal. The package body is stacked with a plurality of sheets where conductive patterns and vias are disposed. The plurality of semiconductor chips are inserted into insert slots extending from one surface of the package body. The external connection terminal is provided on other surface opposite to the one surface of the package body. Here, the plurality of semiconductor chips are electrically connected to the external connection terminal.
摘要:
Provided is a power amplifier device. The power amplifier device includes: a cutoff unit cutting off a direct current (DC) component of a signal delivered from a signal input terminal; a circuit protecting unit connected to the cutoff unit and stabilizing a signal delivered from the cutoff unit; and an amplification unit connected to the circuit protecting unit and amplifying a signal delivered from the circuit protecting unit, wherein the amplification unit comprises a plurality of transistors connected in parallel to the circuit protecting unit and the circuit protecting unit comprises resistors connected to between bases of the plurality of transistors.
摘要:
Provided is an inductor. The inductor includes a first to a fourth conductive terminals formed in one direction within a semiconductor substrate, a first conductive line formed on one side of the semiconductor substrate and electrically connected to the second and third conductive terminals interiorly positioned among the first to fourth conductive terminals, a second conductive line formed on the one side of the semiconductor substrate and electrically connected to the first and fourth conductive terminals exteriorly positioned among the first to fourth conductive terminals, and a third conductive line formed on the other side of the semiconductor substrate and electrically connected to the first and third conductive terminals among the first to fourth conductive terminals.
摘要:
A sub-harmonic mixer is provided, which includes: a mixer core having first and second transistors performing switching operations in response to a local oscillator (LO) signal and a radio frequency (RF) signal; a power source applying bias maximizing nonlinearity of a transistor included in the mixer core; an RF port applying an RF signal to the mixer core; an LO port applying an LO signal to the mixer core; and first and second phase delay circuits in which the RF signals applied to the first and second transistors have a 180-degree phase difference.