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[전자, 전파] RF system receiver

등록일 2002.05.10 파워포인트파일MS 파워포인트 (ppt) | 23페이지 | 가격 1,000원

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목차

1. Homodyne Receiver 특징
1.1 Homodyne Receiver 문제점
1.2 DC Offsets

2. Heterodyne Receiver 특징
2.1 주파수 변환 원리
2.2 Local Oscillator

3. Image Frequency
3.1 LO에 의한 Image Frequency
3.1.1 LO변환방식별 특징
3.2 Example
3.3 Example
3.4 Methods of image rejection
3.4.1 Image-rejection Filter
3.4.2 Hartley Architecture

본문내용

1. Homodyne Receiver 특징

Homodyne
-> Homo(same) + dyne(to mix)
-> Homodyne = direct - conversion = zero - IF
-> Translate RF spectrum to baseband at the 1st downconversion

Advantage
-> No image problem
· No image filter required
-> Amenable for MMIC

Disadvantages
> Poor channel selectivity
> Dc offset
> RF-LO crosstalk
> I/Q mismatch
> Even-order distortion
> Flicker noise
> LO leakage
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