One of the most widely used and simplest antennas is the half-wave (a)  

An antenna that radiates equally well in all horizontal directions is said to be (a)   .

A quarter-wave vertical antenna is commonly known as a(n) (a)   antenna

The measure of an antenna's directivity is (a)   .

One of the most widely used and simplest antennas is the half-wave (a)   .

An (a)   acts as the interface between a transmitter or receiver and free space.

If a parallel-wire transmission line is left open, the electric and magnetic fields escape from
the end of the line and radiate into (a)  

The radiation from a transmission line can be greatly improved by (a)   the transmission line conductors so that they are at a right angle to the transmission line

The ratio of the electric field strength of a radiated wave to the
magnetic field strength is a (a)  

impedance of space, or the wave impedance, and is
(a)   Ω

The resistive component is called the antenna ______ ______

(a)  

The far field that is approximately (a)   wavelengths from the antenna is the radio
wave with the composite electric and magnetic fields.

An antenna can transmit and receive at the same time as long as some
means is provided for keeping the transmitter energy out of the front end
of the receiver. A device called a (a)   is used for this purpose

The length of the antenna conductor is dependent on the (a)  

One of the most widely used antenna types is the half-wave dipole. This antenna is also formally known as the (a)   antenna after Heinrich Hertz

The dipole has an impedance of (a)   Ω at its center, which is the radiation
resistance.

An antenna is a (a)   -sensitive device

(a)   is a phenomenon caused by any support insulators used at the
ends of the wire antenna and has the effect of adding a capacitance to the
end of each wire

Because the antenna is one -half wavelength at only one frequency, it acts as a (a)   circuit

higher the Q, the (a)   the bandwidth BW

If the antenna has too high a Q and its bandwidth is too narrow, the SWR will be higher than _:_ and sideband clipping can occur

(a)  

The cones are shaped such that the shaded area is (a)   to the unshaded area.

Most half-wave dipole antennas are mounted (a)   to the earth

(a)   mounting is preferred at the lower frequencies (<30 MHz) because the
physical construction, mounting, and support are easier

(a)   mounting is common at the higher frequencies (VHF and UHF), where
the antennas are shorter and made of self-supporting tubing
The Dipole Antenna

The radiation pattern of any antenna is the shape of
the (a)   energy radiated from or received
by that antenna.

The radiation pattern of a half-wave dipole has the
shape of a (a)  

The measure of an antenna’s directivity is (a)   . It is measured on an antenna’s
radiation pattern.

Vertical polarization and omnidirectional characteristics can also be achieved by using a one-quarter wavelength vertical radiator. This antenna is known as a (a)   or ground-plane antenna

These horizontal wires at the base of the Marconi antenna are referred to as (a)  

he entire ground-plane collection of radials is often referred to as a (a)   .

(a)   refers to the ability of an antenna to send or receive signals over a narrow horizontal directional range.

A________ ______ consists of a basic antenna connected to a transmission line plus
one or more additional conductors that are not connected to the transmission line

(a)  

The (a)   (back), a parasitic element that is typically about 5 percent longer
than the half-wave dipole-driven element, is spaced from the driven element by a
distance of 0.15λ to 0.25λ

A parasitic element, a (a)   is approximately 5 percent shorter than the half-wave dipole driven
element and is mounted in front of the driven element.