Issue link: https://resources.system-analysis.cadence.com/i/1326181
ELECTROMAGNETIC SIMULATION OF DIRECT COUPLED MICROSTRIP ANTENNA Although the design equations provide the initial dimensional data and radiation patterns for the microstrip antenna design, an EM simulation is generally required to reduce the number of prototype iterations and to achieve the available performance objectives. To that end, an EM simulation of the 5.8 GHz, direct coupled microstrip antenna was executed using the NI QAWR Design Environment AXIEM planar EM simulator. 17 Results of the direct-coupled microstrip antenna electromagnetic simulation are summarized within the graphics of Table 5 and represent a degree of dimensional optimization of the initial design values as previously indicated. TABLE 5: ELECTROMAGNETIC SIMULATION RESULTS Microstrip Antenna Conductor Pattern Conductor Current Distribution (note the concentration of current at the top edges of the conductor) Azimuth (E-Plane) and Elevation (H-Plane) Radiation Patterns Direct-Coupled Microstrip Antenna Input Impedance In addition to providing the ability to optimize antenna performance, the AXIEM simulation software also enables dimensional sensitivity analysis; e.g., as one might expect, the length of the microstrip conductor (L) was found to 17 AXIEM technology utilizes an open-boundary, non-gridded, method-of-moments (MoM) solver that supports thick metal in layered dielectric media. Additional information is available at https://www.awr.com/software/products. 1 0 -10 -20 -30 -40 -50 -60 -70 -80 - 9 0 -100 -110 -120 -130 -140 -150 -160 -170 180 170 160 150 140 130 120 110 100 9 0 80 70 60 50 40 30 20 10 Azimuth and Elevation Patterns Mag Max 10 dB Mag Min -40 dB 10 dB Per Div p2 p1 Mag 6.859 Ang 0 DB(| PPC_EPhi(0,1,90,2,1)| )[3] DCPA_B.$FSAMP DB(| PPC_ETheta(0,1,0,2,1)| )[3] DCPA_B.$FSAMP p1: FREQ = 5.8 GHz p2: FREQ = 5.8 GHz 0 1.0 1.0 -1.0 10.0 10.0 -10.0 5.0 5.0 -5.0 2.0 2.0 -2.0 3.0 3.0 -3.0 4.0 4.0 -4.0 0.2 0.2 -0.2 0.4 0.4 -0.4 0.6 0.6 -0.6 0.8 0.8 -0.8 Input Impedance Swp Max 5.9GHz Swp Min 5.7GHz 5.8 GHz r 0.976309 x -0.0111288 S(1,1) DCPA_B Microstrip Antenna Design 12 www.cadence.com/go/awr