Cardioid (11m), HamSphere 4.0 Shop
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Basics of antennas
Directivity - Wikipedia
Miscellaneous Antennas | VU2NSB.com - Amazing Amateur Radio
Cardioid antenna element - MATLAB
135-HZ BEARING INFORMATION
Antenna Radiation Patterns - an overview | ScienceDirect Topics
Building a cardioid loop antenna with a Cross Country Wireless Loop Antenna Amplifier + by Chris Moulding G4HYG
Antenna Radiation - Phase 3 - Blog - RF Radio Frequency - element14 Community
Microphone polar patterns explained - Blog | Splice
Chapter 32: Antenna Arrays
Figure 5 from A low-profile, compact, wideband antenna array with cardioid-shaped radiation patterns in the azimuth plane | Semantic Scholar
Azimuth cut of cardioid microphone radiation pattern. | Download Scientific Diagram
Building a cardioid loop antenna with a Cross Country Wireless Loop Antenna Amplifier + by Chris Moulding G4HYG
Directional Antenna Performance without a Beam
AL™ Series UHF Television Antennas - Electronics Research, Inc.
Frontiers | Dual-Band Antenna Integrated With Solar Cells for WLAN Applications
Figure 3 from A low-profile, compact, wideband antenna array with cardioid-shaped radiation patterns in the azimuth plane | Semantic Scholar
Cardioid radiation pattern | Download Scientific Diagram
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