Deep Dive: G9D12
The correct answer is A: Inverted V. The common name of a dipole with a single central support is Inverted V. An Inverted V is a dipole bent into a V shape with the apex (center) supported by a single point. For amateur radio operators, this is a popular antenna configuration. Understanding this helps when identifying antenna types.
Why Other Answers Are Wrong
Option B (Inverted L): Incorrect. Inverted L is a vertical with horizontal top section, not a dipole with central support - Inverted V is the dipole. Inverted L is different. Option C (Sloper): Incorrect. Sloper is a wire antenna sloped from high to low, not a dipole with central support - Inverted V is the dipole. Sloper is different. Option D (Lazy H): Incorrect. Lazy H is a different antenna configuration, not a dipole with central support - Inverted V is the dipole. Lazy H is different.
Exam Tip
Dipole with single central support = Inverted V. Think 'I'nverted 'V' = 'I'nverted 'V' shape with 'S'ingle support. An Inverted V is a dipole bent into V shape with apex (center) supported by single point. Not Inverted L, not Sloper, not Lazy H - just Inverted V.
Memory Aid
Dipole with single central support = Inverted V. Think 'I'nverted 'V' = 'I'nverted 'V' shape. An Inverted V is a dipole bent into V shape with apex supported by single point. Popular antenna configuration.
Real-World Example
An Inverted V antenna: A dipole is bent into a V shape, with the center (apex) supported by a single point (e.g., a mast). The ends are lower, creating an inverted V shape. This is a popular configuration - easier to install than a horizontal dipole because it only needs one support point. This is the Inverted V.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G9D
Reference: 2023-2027 Question Pool · G9 - Antennas and Feed Lines
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G9D topic.