Antenna for the UHF band. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Antenna for the UHF band. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Television antennas

Comments on the article

The UHF antenna described in the article by A. Nanakov can be improved by adding three more elements. The gain of the modified antenna has increased significantly, which gives a great advantage when using it both indoors and outdoors.

The design of the antenna is shown in the figure, the dimensions are in the table. For manufacturing, you can use a wire made of copper or brass with a diameter of 3 ... 5 mm. The wire is sequentially bent in the shape shown in the figure, the joints are soldered. For greater structural strength, before soldering, the joints can be pulled together with a thin copper wire.

Antenna for UHF band

The antenna cable is soldered at points "A" and "B". At point "C" the cable sheath is connected to the material of the antenna.

Channels	W, mm	D, mm	F, mm	D, mm	B, mm	R,mm	A,mm	B,mm	Andmm	K, mm	L,mm	W. mm
21 26	68	90	112	134	158	193	67	98	55	43	31	150
27 32	56	78	100	122	144	176	61	89	49	37	25	138
33 40	44	66	88	110	131	160	55	80	43	31	19	124
41 49	33	55	77	99	117	143	50	72	38	27	16	109
50 58	24	45	67	89	105	129	45	69	34	21	12	99
59 68	17	38	59	81	96	113	41	59	30	18	8	96
69 80	10	31	52	73	86	106	37	53	26	14	4	81

Author: V.Cheturako, Gomel; Publication: N. Bolshakov, rf.atnn.ru

See other articles Section Television antennas.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Mobile phone that works without cellular operators 28.06.2019

Oppo has developed MeshTalk technology that allows you to make calls without using cellular networks. The idea implies decentralized data exchange between Oppo smartphone owners and almost complete independence from mobile operators and their terms of service, including international roaming.

The MeshTalk protocol is a decentralized data transmission system. A key feature of the technology, in addition to working outside cellular networks, is the signal transmission range - users can be up to three kilometers apart, writes The Verge resource. MeshTalk also does not use Bluetooth and Wi-Fi modules in its work. The description of the technology does not provide the frequency of the signal and the list of objects that interfere with its distribution, but, according to Oppo itself, as of June 2019, MeshTalk works at a greater distance compared to other similar technologies.

In fact, MeshTalk is a P2P (peer-to-peer) data exchange network without base stations, servers and other intermediate devices. Turning smartphones into a modern analogue of a walkie-talkie, it provides the interlocutors with maximum confidentiality of conversations.

Hardware technology is implemented in the form of a separate chip located on the motherboard of the smartphone. The module consumes a minimum of energy when transmitting a signal, and when it is activated, the smartphone can last up to three days (72 hours) in standby mode. In this case, the gadget will not spend energy searching for base stations, as is the case with the use of cellular networks.

Other interesting news:

▪ 2 GB/s HBM460E memory

▪ Recognition of people at a distance by heartbeat

▪ Brushing your teeth protects your heart

▪ Portable drive Samsung T5 EVO 8 TB

▪ Measured the magnetic field of a black hole at the center of the Galaxy

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Voltage stabilizers. Article selection

▪ article by Lucius Annaeus Seneca (the Younger). Famous aphorisms

▪ article In what city did the population for the first time on Earth reach a million people? Detailed answer

▪ article Safety Engineer. Job description