Korea Aerospace Research Institute

Chan Hong Yeom

In Kyu Kim

Sang Jong Lee

Sang Man Moon

Hyoun Kyoung Kim

Seok Min Ahn

Ik Hyeon Choi

In Hee Hwang

Hae Chang Lee

Tae Sik Kim

Eung Tai Kim

Kyoo Chang Oh

Dae Sung Lee

A composite laminated structure is reinforced by inserting pins into a device for manufacturing a composite laminated structure. The device has a bottom guide on a composite laminated structure in a pre- or post-cured state. The device has first vertical pins that are inserted into the composite laminated structure. A top guide, on the bottom guide, has guide pins that are movable in a vertical direction at positions corresponding to the first pins.

Composite laminated structure reinforced by inserting pins, a method and a apparatus for making the same and a method for making the apparatus

There is provided a frequency transceiver for automatically controlling a TX/RX IF signal in a radar or a communication system, which transmits/receives an RF signal. The frequency transceiver includes a local oscillator for oscillating a VHF proportional to a VHF oscillation control voltage, a first IF processor for mixing an external RF signal with the VHF signal oscillated by the local oscillator and converting the RF signal into an IF signal proportional to the VHF signal, a second IF processor for mixing the RF signal oscillated by the RF oscillator with the VHF signal oscillated by the local oscillator, converting the RF signal into an IF signal proportional to the VHF signal, and converting the converted IF signal into a voltage, a control signal generator for generating a control signal to control the VHF signal oscillation of the local oscillator according to an output voltage of the second IF processor, and a VHF oscillation controller for outputting the VHF oscillation control voltage to the local oscillator according to the control signal generated from the control signal generator.

Frequency transceiver for controlling intermediate frequency

Growing community of inventors

Daejeon, South Korea

Chan Hong Yeom