THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS TECHNICAL REPORT OF IEICE. 56 8531 1 3 E-mail: morisaka@ec.ee.es.osaka-u.ac.jp, {shiomi,okamura}@ee.es.osaka-u.ac.jp 2.665GHz 29 1.2, Active Fased Array Antenna by Dual Feed Patch Antenna Shinnichi MORISAKA, Hidehisa SHIOMI, and Yasuyuki OKAMURA Graduate School of Engineering Science,Osaka Universitry 1-3 Machikaneyama cho, Toyonaka shi, Osaka, Japan 56 8531 E-mail: morisaka@ec.ee.es.osaka-u.ac.jp, {shiomi,okamura}@ee.es.osaka-u.ac.jp Abstract This paper describes fablication of Active Fased Array Antenna and evaltuation of characteristic.that antenna is active fased array antenna that consist of copled oscillator, injected signal, and controll each oscillator s phase by utilization of syncronize phenomenoma. In this paper,fased array antenna that consist of oscillator coupled by dual-feed-patch-antenna is proposed. Patch antenna works as also radiator.proposed antenna worked in 2.665GHz.By 29 degree of fase differnce of injection signal,a direction of main beam tilted 1.2 degree. Key words ActiveArrayAntenna,DualFeed-PatchAntenna 1. [ ] [ ] 1
Injection Singnal PatchAntenna Asin(ƒÖt ) -Asin(ƒÖt + ƒó) Oscillator 1 Fig. 1 Structure of proposed active fased array antenna 2. 2 2. 2. 1 2. 2. 1 E z Port 1 Port 2 2 Fig. 2 dual-feed patch antenna 1 25Ω 2 25Ω 5 1 2. 2. 2 1 Table 1 Parameter of Micro Strip Line Z, Z 1 5,25,, 3λ g /4, λ g /4, λ g /2 Asin(ƒÖt ) arg( ) - arg( ) = 9 -Asin(ƒÖt ) 3 φ= 5 Fig. 3 Current distribution when φ= λ g 1:3 λ g/2 Me j Me jƒó/4 Me j2ƒó/4 Me j3ƒó/4 Me jƒó 25 Asin(ƒÖt ) λ g/2 25 -Asin(ƒÖt + ƒó) 4 Fig. 4 fased array 2
2.3865GHz = λ g/2 VDP 3 2.3865GHz VDP 25 456.4V VDP 2 912.8V 25 2 25 Table 2 Parameter of array antenna 4.8 4 φ 1.3 1 6 S/m φ.8mm 28.mm 46.34mm VDP 2.363GHz 3. VDP L 2.25 1 C 6 3. 1 6 v L C Fig. 6 VDP i VDP R 1 5. R 3.1 2.3865GHz 912.8 V 3. 2 VDP V φ. 4.1 1nS 8 9 5 Maxwell FDTD [ ] 1 2 3 4 5 6 7 8 9 1 7 FDTD Fig. 7 Number of port of patch antenna FDTD FDTD 4. 4. 1 1 25 25 1 FET 25 6 VDP 5 2 VDP i-v 5 v = R 1 i + R 3 i 3 (1).V 11 +3.1dB 2.597GHz±1MHz 3
TopView SideView Asin( Öt ) VDP = 5 = 25 = 3 Ég /4 = É g /4 -Asin( Öt + Ó) = É g /2 図 5 シミュレーションモデル Fig. 5 simulation-model 28.mm 46.3448mm 1.6dBm 1.6dBm 28.mm Î { Ó LineStrecher SG 図 12 試作したアクティブフェーズドアレイアンテナ Fig. 12 Manufactured Active Fased Array Antenna φ = Deg. φ = 4.1 Deg. 5 Phase [ Deg. ] 6 Vpltage [ V ] 5 4 3 3 ψ 4+18 2 ψ 2+18 1 ψ 1+18 ψ 6+18 4 1 2 ψ 8+18 1 1 2 3 4 5 6 Port 7 8 9 1 2 3 4 5 6 Port 7 8 9 1 図9 位相分布 Fig. 9 Distribution of phase 図8 振幅分布 Fig. 8 Distribution of amplitude 4. 2 アレイアンテナの試作 図 12 に試作したアレイアンテナの写真を示す 強制信号は シグナルジェネレータから供給している シグナルジェネレー -8-4
Spectrum Analizer 5ƒ 4.36mm 5ƒ 25ƒ 5.8mm D G S 2.65mm 5ƒ 4.36mm DrainBias 1 Fig. 1 Oscillator GateBias Short 12nH 1pF 6.8nF 1pF 2.2nH -1-15 φ = Deg φ = 29 Deg Output (SpeAna) [ dbm ] 3 2 1 1.2 1.4 1.6 1.8 2 Drain Bias [ V ] Fig. 11 11 Output of oscillator -2-9 -6-3 3 6 9 18 +φ 2.6GHz 2.6GHz -1-2 -1 1 2 14-28.mm Fig. 14 Radiation Pattern - near boaside 4 1 4. 3 15 16.V 1.85 1.33V 1.33V 1.2 11 4.6dBm 1.6dBm 5. 2.665GHz 1 2.6GHz 29 13 14 29 1.2 1.2 13 13 Fig. 13 Radiation Pattern φ = Deg φ = 29 Deg 5
Theory Measured -1-15 -2-9 -6-3 3 6 9 15 Fig. 15 -φ=deg compare with theory-φ=deg -1-15 -2-9 -6-3 3 6 9 16 Fig. 16 -φ=29deg compare with theory-φ=29deg [1] FDTD 1998. [2] 1996. 6