Quantcast Basic Slot Antenna and Its Complementary Dipole

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
3-17 Basic Slot Antenna and Its Complementary Dipole The slot antenna consists of a radiator formed by cutting a narrow slot in a large metal surface. Such an antenna is shown in figure 3-18. The slot length is a half wavelength at the desired frequency and the width is a small fraction of a wavelength. The antenna is frequently compared to a conventional half- wave dipole consisting of two flat metal strips. The physical dimensions of the metal strips are such that they would just fit into the slot cut out of the large metal sheet. This type of antenna is called the COMPLEMENTARY DIPOLE. Figure 3-18.—Slot antenna and complementary dipole. The slot antenna is compared to its complementary dipole to illustrate that the radiation patterns produced by a slot antenna cut into an infinitely large metal sheet and that of the complementary dipole antenna are the same. Several important differences exist between the slot antenna and its complementary antenna. First, the electric and magnetic fields are interchanged. In the case of the dipole antenna shown in figure 3-18, the electric lines are horizontal while the magnetic lines form loops in the vertical plane. With the slot antenna, the magnetic lines are horizontal and the electric lines are vertical. The electric lines are built up across the narrow dimensions of the slot. As a result, the polarization of the radiation produced by a horizontal slot is vertical. If a vertical slot is used, the polarization is horizontal. A second difference between the slot antenna and its complementary dipole is that the direction of the lines of electric and magnetic force abruptly reverse from one side of the metal sheet to the other. In the case of the dipole, the electric lines have the same general direction while the magnetic lines form continuous closed loops. When energy is applied to the slot antenna, currents flow in the metal sheet. These currents are not confined to the edges of the slot but rather spread out over the sheet. Radiation then takes place from both sides of the sheet. In the case of the complementary dipole, however, the currents are more confined; so a much greater magnitude of current is required to produce a given power output using the dipole antenna.


Electrical News
Last Man on Earth: How Would You Behave?
How do you think you'd behave if you were the...
eetimes.com
Channel Consolidation & Conflict: Back to the Future!
As much as everything changes, everything still stays the same....
eetimes.com
Is Formal Verification Artificial Intelligence?
Artificial intelligence or not, formal verification is a technology that...
eetimes.com
Is Formal Verification Artificial Intelligence?
Artificial intelligence or not, formal verification is a technology that...
eetimes.com
Wearable Cameras Next Boom Market for Image Sensors
Annual shipments of wearable cameras will surpass 30 million units...
eetimes.com
Resistive RAM Memory is Finally Here
Resistive RAM's low power consumption and small cell area make...
eetimes.com
NVM Express SSDs Hit Servers, Workstations
HGST begins shipping its Ultrastar SN100 series for servers announced...
eetimes.com
Moore's Law Demise: Maybe It's a Good Thing
Moore's Law will celebrate its 50th anniversary on April 19,...
eetimes.com
The GaN Era Approaches
Gallium nitride possesses many characteristics that will allow production of...
eetimes.com
Making Wireless LoRa Design Easier, Faster
Microchip has a pre-certified coin-cell sized module to accelerate deployment...
eetimes.com
Engine Yard Pivots Toward Container Management
New Engine Yard CEO Beau Vrolyk is moving the company...
eetimes.com
Transceiver Supports Dual 2.4 GHz IoT Networks
Industrial applications, home automation, and the like often need multiple...
eetimes.com
Moore's Law @50 in the News
Here's a sampler of some of the best of the...
eetimes.com
When Blueprints Were Really Blue: Is Engineering Becoming Less Satisfying?
Back then, working as a professional EE was like being...
eetimes.com
MINI Giving Drivers a Peek at 'Augmented Reality'
Although most drivers have yet to embrace the idea of...
eetimes.com
eevBLAB #9 – Meet Dave
Meet Dave2, the first EEVblog employee....
eevblog.com
Qualcomm to Leverage Monolithic 3D for Smartphones
Qualcomm is looking to leverage Monolithic 3D IC technology to...
eetimes.com
Full Human Head Transplant May Be Closer Than You Think
Suddenly, some of the things we read in science fiction...
eetimes.com
Automotive Chip Reliability: A Matter of Design Methods
Up to 90% of all innovations today are generated through...
eetimes.com
Paper Memory Ready to Roll
Researchers at the Finish VTT Technical Research Centre have demonstrated...
eetimes.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +