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Transmission Lines and Antenna Systems

Advanced Antenna Design Quiz

This challenging 20-question quiz delves into advanced antenna design, targeting seasoned ham radio enthusiasts eager to test or expand their knowledge.

1 / 20

In a phased array, what is the primary method to achieve a directional pattern?

Varying the length of each element

Varying the height above ground

Varying the spacing between elements

Adjusting the phase of each element

2 / 20

Which antenna is known for having both horizontal and vertical radiation patterns?

Turnstile

Helix

Beverage

Windom

3 / 20

How does the gain of a two-element Yagi compare to a dipole?

Much less

About the same

Slightly more

Much more

4 / 20

What happens to the radiation resistance of a short dipole as it's made shorter?

It increases

It decreases

It remains constant

It becomes capacitive

5 / 20

Which of the following is NOT a primary component of a quad antenna?

Reflector

Director

Driven element

Radial

6 / 20

What is the main benefit of using a log-periodic antenna?

Omnidirectional pattern

Extremely high gain

Broadband operation

Low noise

7 / 20

What type of antenna uses a long wire with a series of loading coils or capacitors?

Rhombic

Zepp

Helical

Log-periodic

8 / 20

Which antenna has a radiation pattern shaped like a figure-eight?

Vertical

Dipole

Yagi

Loop

9 / 20

Which of the following best describes a collinear antenna design?

Elements arranged side-by-side

Elements arranged in a circular pattern

Elements stacked end-to-end

Elements in a crisscross pattern

10 / 20

What is the primary advantage of a stacked antenna configuration?

Wider bandwidth

Reduced feedline loss

Higher gain

Lower noise floor

11 / 20

Which type of antenna is most sensitive to the height above ground?

Vertical dipole

Horizontal loop

Yagi

Beverage

12 / 20

What determines the resonant frequency of a loop antenna?

The area enclosed by the loop

The diameter of the wire

The length of the loop

The height above ground

13 / 20

What antenna configuration uses a driven element with a parasitic element to achieve directionality?

J-pole

Zepp

Yagi

Windom

14 / 20

How is the feed point impedance of an end-fed half-wave (EFHW) antenna typically characterized?

Low impedance

High impedance

50 Ohms

300 Ohms

15 / 20

For a quarter-wave vertical antenna, what is the ideal number of radials?

As many as possible

16 / 20

Which of the following antenna types exhibits the highest gain?

Dipole

Isotropic radiator

Parabolic dish

Loop

17 / 20

What is the primary radiation pattern of a vertical antenna over perfectly conducting ground?

Bidirectional

Omnidirectional

Unidirectional

Elliptical

18 / 20

What is the primary purpose of using a balun with a dipole antenna?

To match impedance

To prevent RF current on the feedline

To increase bandwidth

To boost signal strength

19 / 20

In a Yagi-Uda antenna, which element is the longest?

Reflector

Driven element

Director

None of the above

20 / 20

What is the primary advantage of a Beverage antenna?

Broadband capabilities

Directional reception

Omnidirectional radiation pattern

Short physical length

Your score is

The average score is 46%