1. Basics of Antenna Engineering

2. 0. Text
Introduction (교재 소개)
Warren L. Stutzman and Gary A. Thiele, "Antenna Theory and Design," 3rd ed., Wiley, 2012.
Constantine A. Balanis, "Antenna Theory: Analysis and Design," 2nd ed., John Wiley & Sons, 1996.
Kin-Lu Wong, "Compact and Broadband Microstrip Antennas," John Wiley & Sons, 2002.

3.  Transmission Information Channel bandwidth Base band
1. Microwave Systems
Transmission 
Information
Channel bandwidth
Base band
Inefficient wave radiation
Modulation – center frequency
출처: RFDH.com
Time domain
Frequency domain

4.  Why do we need modulation? Transmission efficiency Multiplexing
1. Microwave Systems
Why do we need modulation? 
Transmission efficiency
Multiplexing
Antenna length: wavelength
Wave radiation: comparison with DC
Battery: DC
Antenna: AC

5.   Microwave transmitter (Tx) Up-conversion: frequency
1. Microwave Systems
Microwave transmitter (Tx) 
Up-conversion: frequency
출처: RFDH.com 

6.   Microwave receiver (Rx) Down-conversion: frequency
1. Microwave Systems
Microwave receiver (Rx) 
Down-conversion: frequency
출처: RFDH.com 

7.  Microwave transceiver Duplexer: bandpass filter or switch
1. Microwave Systems
Microwave transceiver 
Duplexer: bandpass filter or switch
Loss, tx suppression, channel selection
출처: RFDH.com
IF: superheterodyne
No IF: direct conversion

8. 1. Microwave Systems
Antenna 
Important passive device
Innovation

9.  Aegis combat system: S-band
1. Microwave Systems
Aegis combat system: S-band 
SPY-1(1974): phased array radar, smart antenna
4 phased array radars, 3.6m x 3.6m, 4350 elements

10.   Phased array radar S-band: 2 ~ 4 GHz Cost: about half billion $
1. Microwave Systems
Phased array radar 
S-band: 2 ~ 4 GHz
Cost: about half billion $ 
Several megawatts radar

11.  SBX (Sea Based X-band radar) X-band: 8 ~ 12 GHz
1. Microwave Systems
SBX (Sea Based X-band radar) 
X-band: 8 ~ 12 GHz
Cost: about 1 billion $
Norway, Russia, and USA
Missile Defense: early warning radar – SBX – ground based interceptor

12. 2. Antennas
Hertz antenna (1886)

13. 2. Antennas
RC circuits

14. Simple model for antenna
2. Antennas
Simple model for antenna

15.  Dipole antenna Simple but long structure Low efficiency 2. Antennas
Microstrip type

16. 2. Antennas
Loop antenna 
Simple structure
Low efficiency

17. First mobile phone 2. Antennas Dr. Martin Cooper on 1973 Motorola
850 [g] 17

18.  Helical antenna Complicated structure Medium efficiency 2. Antennas
Handy phone antenna

19. 2. Antennas
Triple band antenna 19

20.  Array antenna Complicated structure High efficiency 2. Antennas
Yagi antenna: one source

21.  Microstrip patch antenna Simple and small structure Low efficiency

22. 2. Antennas
Antenna simulation
Ansoft: Ensemble
Ansoft: HFSS
CST: MWS