Table 2 Optimization results for Circuit I.

From: Direct constraint control for EM-based miniaturization of microwave passives

Optimization approach

Performance parameters

Design scenario I (F = [1.45 1.55] GHz)

Design scenario II (F = [1.47 1.53] GHz)

Method

Setup

Footprint area A (mm2)

Violation of constraint γ1 (dB)

Violation of constraint γ2 (dB)

Footprint area A (mm2)

Violation of constraint γ1 (dB)

Violation of constraint γ2 (dB)

Implicit constraint handling (penalty function approach)

β1 = 101, β2 = 101

241

0.03

6.8

264

0.07

3.5

β1 = 101, β2 = 102

259

0.06

5.3

264

0.07

3.5

β1 = 101, β2 = 103

301

− 0.01

1.9

272

0.02

2.1

β1 = 101, β2 = 104

325

0.01

0.2

293

0.02

0.2

β1 = 102, β2 = 101

247

− 0.05

6.6

264

0.07

3.5

β1 = 102, β2 = 102

258

− 0.02

5.7

276

0.00

1.7

β1 = 102, β2 = 103

318

0.01

1.0

292

− 0.01

0.5

β1 = 102, β2 = 104

319

0.00

0.3

297

− 0.08

0.3

β1 = 103, β2 = 101

247

− 0.04

7.1

333

− 0.00

0.5

β1 = 103, β2 = 102

264

− 0.03

53

335

− 0.01

1.0

β1 = 103, β2 = 103

318

− 0.01

1.3

322

− 0.02

− 1.1

β1 = 103, β2 = 104

319

0.00

0.2

301

− 0.05

0.1

β1 = 104, β2 = 101

242

0.00

6.9

323

− 0.00

0.5

β1 = 104, β2 = 102

258

− 0.05

5.7

292

− 0.06

0.8

β1 = 104, β2 = 103

310

− 0.03

1.4

325

− 0.00

0.0

β1 = 104, β2 = 104

317

0.00

0.4

302

− 0.07

0.1

Explicit constraint handling (this work)

323

0.00

0.0

293

− 0.05

0.3