Essay: The effective length of the radiating slot

The effective length of the radiating slot is used to determine the resonant frequency.
Effective length of a radiating aperture is used to determine the resonant frequency.
The effective length of the slot can be varied by extending or truncating the radiating slot by use of Switches, such as, RF MEMs, PIN diodes and Varactor diodes.
The length of the slot can be varied by extending or truncating the radiating slot by use of RF switches, such as, RF MEMs (Micro Electro-Mechanical Systems), p-i-n diodes, FET or Varactor diodes.
PIN diodes are extensively used as they are inexpensive, are easy to fabricate & provide reasonable performance.
PIN diodes are generally used in Antenna designs as they are inexpensive, are easy to fabricate & provide reasonable performance.
In [8], a microstrip fed slot antenna in which the length of the inverted L-shaped slot is altered to achieve frequency reconfigurability.
In [8], a slot antenna which is fed by a microstrip feedline, the length of the inverted L-shaped slot is altered to achieve frequency reconfigurability.
In this paper, a novel design of a reconfigurable near-circular slot antenna that offers switchable operation in the upper frequency band of 4.35 GHz’6.72GHz for Cognitive Radio Systems is being proposed.
In this paper, a novel design of a reconfigurable near-circular slot antenna that provides frequency reconfigurability in the upper frequency band of 4.35 GHz’6.72GHz for Cognitive Radio Systems is being proposed.
The proposed antenna comprises a slot cut in the ground plane of the antenna.
The ground plane of the proposed antenna has a slot cut out.
The slot is excited by the multistage feed line.
The antenna is designed with a 1. 6mm thick FR4 substrate of relative permittivity of 4.4 and loss tangent of 0.02 is shown in Fig. 1.
The slot is fed by a two-step feed line structure.
FR4 substrate has been used in Antenna design which is having thickness of 1.6mm, relative permittivity (??r) value of 4.4 and having the value of loss tangent as 0.02. The design is as shown in Fig. 1.