Radio-Frequency Electronics: Circuits and
This second, updated edition of the best-selling Radio-Frequency Electronics introduces the basic concepts and key circuits of radio-frequency systems. It covers the fundamental principles applying to all radio devices, from wireless single-chip data transceivers to high-power broadcast transmitters. This new edition is extensively revised and expanded throughout, including additional chapters on radar, digital modulation, GPS navigation, and S-parameter circuit analysis. New worked examples and end-of-chapter problems are included to aid and test understanding of the topics covered, as well as numerous extra figures to provide a visual aid to learning. Key topics covered include filters, amplifiers, oscillators, modulators, low-noise amplifiers, phase lock loops, transformers, waveguides, and antennas. Assuming no prior knowledge of radio electronics, this is a perfect introduction to the subject. It is an ideal textbook for junior or senior courses in electrical engineering, as well as an invaluable reference for professional engineers in this area.
- ASIN: B002S3UBHO
NuDerma Skin Therapy Wand - Portable Handheld High Frequency Skin Therapy Machine w/Neon - Acne Treatment - Skin Tightening - Wrinkle Reducing - Dark Circles - Puffy Eyes - Hair
Adeonsine Tri-Phosphate (ATP) is the universal currency for energy in all cells of the human body. As we age ATP production slows which can lead to the outward signs of aging. Sagging skin, hair loss, age spots are other skin imperfections are the hallmark signs of decreased cell activity due to aging. The NuDerma Skin Wand amplifies cell turnover by supercharging ATP synthesis to slow, halt and ultimately reverse the aging process leading to firmer younger skin. An painless and rejuvenating current pulses through the wand into the many layers of your skin supercharging cell activity naturally."Our 100% natural High Frequency Galvanic Machine brings complete skin care into the modern age from the comfort of your own home. Our device releases totally painless galvanic waves to stimulate collagen, improve blood flow and even treat acne. This all in one solution includes 4 attachments to meet all skin care needs including broad treatment, spot treatment, sensitive treatment and scalp/hair treatment.
- Brand: Pure Daily Care
- ASIN: B06W5PD1KY
- UPC: 709311880201
2019 Upgrated Ultrasonic Pest Repeller 6 Pack, Pest Control Ultrasonic Repellent, Electronic Insects & Rodents Repellent for Mosquito, Mouse, Cockroaches,Rats,Bug, Spider,
Do you often get woken up at midnight by mosquitoes or other pests? Are you tired of cleaning droppings or dead rodents? Are you still using chemical insecticide that may harm your children and pets to kill pests? JUST TRY IT & IT'S AMAZING ✦ Low Consumption & High Efficiency: 360°all directional expelling on pests. 0.096 kWh per day per pest repellent. Keep plugging in pest repellent all day for continuous effect. ✦ Built with high quality ABS safety, flame retardant material ✦ Quality certified: This ultrasonic pest repeller is high quality, low energy consumption, flame retardant, safer, more environmentally friendly, anti-drop and durable. SPECIFICATION - Ultrasonic Frequency: 22-65KHz - Rated voltage: AC 90～220V - Rated power：5W - Material：ABS - Power frequency：50～60Hz - Color: White - Size: 3.54 * 2.2 * 1.97 in - Weight: 0.18 lb - Effective Coverage Area: 800- 1,200 Sq. Ft./unit - Using environment temperature: 0°C -40°C - Package Including: 6 packs WARM TIPS 1. Keep distances from carpet, curtain and any sound absorption material that may reduce the effect. 2. A number of rodents and insects may increase in the first few days. And the ultrasonic pest repellent will drive them away completely about four weeks later. 3. For secure: DO NOT let the chi...
- Color: 6 Pack
- Brand: Bocianelli
- ASIN: B07T9ZJ8H9
FDA cleared OTC HealthmateForever YK15AB TENS unit with 4 outputs, apply 8 pads at the same time, 15 modes Handheld Electrotherapy device | Electronic Pulse Massager for Electrotherapy Pain Management
Directions for use: Press the wire plug to the output port at the top of the unit; Connect the electrode pads to the electrode wire by inserting pins to the female pin electrodes; Make sure each part connected firmly. Remove the protective film and place the electrode pads on the targeted area, making sure that both pads are attached on the skin tightly and not overlapping; Turn on the unit via the on/off switch; it will automatically start from mode 1 and level 1; Change the modes by pressing one of the 15 different mode buttons displayed on the front of your device; To Control your A1/A2 ports use the intensity buttons located on the left hand side of the device. Increase the intensity by pressing intensity (+) button for the channel A in use; Please increase the intensity gradually and gently to test your acceptance level of the intensity; to decrease the strength, press the (-) button for the channel A in use; To control your B1/B2 ports use the intensity buttons located on the right-hand side of the device. Gradually increase the intensity by pressing intensity (+) button for the channel B in use; to decrease the strength, press the (-) button for the channel B in use; Intensity should be set at a level where you will experience some muscular vibration and involuntary mu...
- Brand: HealthmateForever
- ASIN: B00O7CM12W
HomeSweety Ultrasonic Pest Repeller, Electronic Plug-in Ultrasonic Pest Control, Best Pest Repellent for Cockroach, Rodents, Flies, Roaches, Ants, Mice,Spiders,
About The Product: Our Ultrasonic Pest Repeller is the upgraded version which applies the ultimate ultrasound technology to repel away bugs, mice, cockroaches, rodents, spiders, ants and rats, in doing so driving them away from the vicinity of the sound source,while safe for human and pets. Just plug our electronic pest repellers into the socket to compel pests from leaving your home, no need to clean up dead insects and pests anymore! Click on the "ADD TO CART" to enjoy animal-friendly & ecofriendly pest repelling experience! Features: - Repels Bugs, Ants, Mice, Cockroaches, Mosquitoes, Spiders, Rats, and More - Non-toxic& Environment-friendly - ON/OFF Button to Control Night Light - Standard Wall Plug-In - Indoor Use Only - Ultrasonic Frequency:22-65KHz - Power Source: AC90-250V - Power: 5-6W - Operating temperature: 32°F - 104°F - Effective coverage area: 800 - 1200 square feet Note: 1)This machine should be installed at 30cm centimeter away from the floor and should be vertical to the floor and plug to the outlet. 2)The installing point should be avoided to be in the back of the curtain, fridge, and any other furniture that deterring or attaching frequency. 3) It's normal that the mouse and vermin will increase at the beginning of the using days because they are getti...
- Color: White
- Brand: Homesweety
- ASIN: B07T3F4HV9
CaGuan Anti-Spy Wireless RF Signal Detector Set [2019 Latest Upgrade] Bug GPS Camera Signal Detector，for Hidden Camera GSM Listening Device GPS Radar Radio Scanner Wireless Signal Device
The latest upgrade! The same price! How would you choose?In 2018, privacy is a key point that we are increasingly focusing on. More and more signal trackers, invisible cameras, BUG devices are monitoring our privacy all the time!This is the CaGuan G318+ wireless signal detector (handheld) that helps you detect the surrounding wireless signal waves and protect your privacy!The Professional Wireless Radio Frequency Detector is a low-cost, highly effective bug sweeping device that detects a wide range of illegal spying devices Various signal transmission devices can be detected, such as hidden wireless cameras, GPS trackers, digital recorders, error and invisible headphones, and various devices that transmit signals, such as mobile network connection devices, can detect them.Our product has the highest performance ratio among the similar detectors, which is totally different from the plastic and inferior one with unstable or ineffective function. This signal detector possesses the same and stable function as the high-price detector has. Importantly, the most suitable price we promise, and the best choice you have!Detection Range: 2.4GHz wireless camera: 32.8ft(Standard 10mW camera); 1.2GHz wireless camera: 49.2ft(Standard 10mW camera) ; 2G/3G/4G phone signal: 9.8ft-49.2ftDetection S...
- Color: Black
- Brand: CaGuan
- ASIN: B07GZJ8QVX
- UPC: 613845981191
Kemo Electronic (M161) Ultrasonic Power
High-power ultrasound pulse generator with loudspeaker ... to scare off wild animals such as martens, wild boars, deer, etc. from gardens, fields, etc. The loudspeaker emits pulsed ultrasound tones, which with an attached tube (not included) has an acoustic range of up to to have 300 m! Available accessories: L010 - Ultrasonic Piezo Speaker
- Brand: Kemo Electronic
- ASIN: B002AFL1JW
KB Electronics, 9533, KBMA-24D, 1HP, 1-Phase, 110-120V;200-240V (Input), Nema 1 Enclosure, Variable Frequency
KBMA-24D Hybrid AC Drive, A Digital Drive with Analog Interface Rugged Aluminum NEMA-1 / IP-50 Enclosure Primary Features: Horsepower (Kw) 1/8 (.09) to 1.0 (.75), Jumper Selectable 1Ø Input 115/230 VAC, 50/60 Hz 3Ø Output 230 VAC On/Off AC Line Switch, 200% Starting Torque Diagnostic LED Status Indicators Class "A" (CE) RFI Filter* Additional Features: Flux Vector Compensation with Static Auto-Tune provides excellent speed regulation with high torque loads throughout the entire speed range. Auto energy saving at light loads. Smooth motor torque. Electronic Inrush Current Limit (EICLTM) Protection Run/Fault Relay Output Contacts Holding Torque at Zero Speed in "Stop" mode Undervoltage and Overvoltage Protection Short Circuit Protection, phase to phase Ride-Through momentary power loss Regeneration Protection eliminates tripping Basic Programmable Trimpot Adjustments *Model KBMA-24DF Drive Options: Forward-Stop-Reverse Switch Signal Isolator, Auto/Manual Switch Dimensions approx. in (cm). 7.00" (17.8) x 4.95" (12.7) x 4.15" (10.7). Agency approvals: UL, CE, CSA, C-Tick.
- Brand: KB Electronics
- ASIN: B01AOCJT0K
- UPC: 024822095334
Signstek Portable High Frequency Skin Tightening Acne Spot Wrinkles Remover Beauty Therapy Puffy Eyes Body Care Facial
Signstek Portable High Frequency Skin Tightening Acne Spot Wrinkles Remover Beauty Therapy Puffy Eyes Body Care Facial Machine
- Brand: Signstek
- ASIN: B00EON7ZAM
Frequency (DVD)What if you had the chance to travel back in time and change just one event in your life? What would it be? For John Sullivan (Jim Caviezel--The Passion of the Christ), there is no question. He would undo the events of October 12, 1969, when the out-of-control Bruxton fire took the life of his father, Frank (Dennis Quaid--Far From Heaven), a heroic firefighter. Ever since he was a kid, John has dreamed of being able to stop the tragedy of that fateful day, which set into motion the anger and loneliness that have haunted his adult life as a cop in the 1990s. Now John may get exactly what he wished for--and much more than he bargained for--when John saves his father but causes another tragedy that father and son must race against time to undo.]]>
- Brand: Warner Brothers
- ASIN: B00004YA66
- UPC: 794043505829
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