NO151438B - BROADBAND AMPLIFIER WITH AN AMPLIFIER PART AND A BACKUP PART - Google Patents
BROADBAND AMPLIFIER WITH AN AMPLIFIER PART AND A BACKUP PART Download PDFInfo
- Publication number
- NO151438B NO151438B NO790103A NO790103A NO151438B NO 151438 B NO151438 B NO 151438B NO 790103 A NO790103 A NO 790103A NO 790103 A NO790103 A NO 790103A NO 151438 B NO151438 B NO 151438B
- Authority
- NO
- Norway
- Prior art keywords
- metal
- metal element
- antenna
- plastic tube
- plastic
- Prior art date
Links
- 239000002184 metal Substances 0.000 claims description 32
- 239000004020 conductor Substances 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 5
- 230000005855 radiation Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/347—Negative-feedback-circuit arrangements with or without positive feedback using transformers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/36—Repeater circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
KvartbOlgeantenne av jordplantypen. Quarter wave antenna of the ground plane type.
Den foreliggende oppfinnelse angår en kvartbolgeantenne av jordplantypen, innbefattende et ytre metallelement og et indre metallelement, som sammen danner en koaksialresonator, hvis indre element er forbundet med jordete motvektelementer, og hvor en koaksial matningsledning for antennen med sin innerleder er tilsluttet det ytre metallelement og med sin ytterleder tilsluttet det indre metallelement. - The present invention relates to a quarter-wave antenna of the ground plane type, including an outer metal element and an inner metal element, which together form a coaxial resonator, whose inner element is connected to grounded counterweight elements, and where a coaxial feed line for the antenna with its inner conductor is connected to the outer metal element and with its outer conductor connected to the inner metal element. -
Det karakteristiske for oppfinnelsen er at det indre metallelement er utfort som bærende metallror, mens det ytre metallelement er utfort som metallfletning innleiret i et plastrer, og at plastrøret med sin nedre ende er forbundet med den ytre periferi av en ringformet isolatorplate hvis underside er festet til en skive som bærer motvektelementene og hvis indre periferi er festet til metallrorets nedre endeparti. Herved oppnås at antennen i seg selv er et lukket legeme av korrosjonsfast plast, som bare ved sin underside er forsynt med motvektelementene. Det som bærende metallror utfort indre metallelement gir plast-røret stor mekanisk fasthet, og den ringformete isolatorplate medforer perfekt tillukking av antennelegemet, minst mulige angrepsmuligheter for korroderende stoffer samt lett monter- og demonterbarhet av antennen. - The characteristic of the invention is that the inner metal element is designed as a supporting metal tube, while the outer metal element is designed as a metal braid embedded in a plaster, and that the plastic tube with its lower end is connected to the outer periphery of an annular insulator plate whose underside is attached to a disc which carries the counterweight elements and whose inner periphery is attached to the lower end portion of the metal rudder. This results in the antenna itself being a closed body of corrosion-resistant plastic, which is only provided with the counterweight elements on its underside. The inner metal element that supports the metal tube gives the plastic tube great mechanical strength, and the ring-shaped insulator plate results in perfect closure of the antenna body, the least possible attack opportunities for corrosive substances and easy mounting and dismounting of the antenna. -
Oppfinnelsen forklares nærmere i til-knytning til tegningen, som viser en utfbrelsesform for en antenne ifolge oppfinnelsen. - The invention is explained in more detail in connection with the drawing, which shows an embodiment of an antenna according to the invention. -
Fig, 1 er et snitt gjennom antennen, og fig. 2 er et snitt gjennom en detalj ved antennen i fig. 1, vist i stbrre målestokk. - Fig, 1 is a section through the antenna, and fig. 2 is a section through a detail of the antenna in fig. 1, shown on a larger scale. -
Antennen er anbragt på et holderorgan i form av et rbr 10, som i sin ovre ende er forsynt med en flens 12. på flensen 12 er festet en rund skive 14> hvis nedre flate frem mot periferien er konisk utformet for opptagelse av et antall motvektelementer 16, som er fastskrudd på skiven 14 og lett ut-skiftbare for bl.a. å lette transporten, monteringen samt vedlike-holdet av antennen samt for evt. skiftning av antennens bølgeleng-deområde. Motvektelementene 15 består hensiktsmessig av til alle sider lukkete liietallsylindre og er galvanisk forbundet med det jordete bærerbr 10. I sin ovre ende er skiven 14 forsynt med et sentrisk og rundt uttak 18, hvori er innsatt en bunnplate 20, som er festet ved hjelp av skruer som går gjennom hull i skiven 14 og inn i bunnen 18. En metallisk sylinder 22 er festet til bunnplatens 20 omkretskant og er i sin ovre ende forbundet med antennens strålingselement 24. Dette strålingselement er ifolge fig. 2 utfort som et stivt legeme 26 av plast, hvorpå er anbragt en metallfletning 28, som på sin side er overdekket av et plastsjikt 30. Som plastsort egner seg glassfiberblandet polyesterplast. Kjernen 26, metallfletningen 28 og det ytre dekksjikt 30 er innbyrdes fast forbundet og danner et helt homogent ror av plastmateriale, hvori metallfletningen 28 er innleiret. Strålingseleraentet 24 har en ovre plan sirkelrund flate 32 og en til dens periferi sluttet sylindrisk flate 34» Den nedre ende av strålingselementet 24 strekker seg inn i en isolator 36, utformet som en ringformet plate med oppadrettet periferisk flens 38. Flensen 38 griper beskyttende omkring strålingselementets 24 nedre ende, Ringplaten 36 er festet til roret 22 ved sin indre periferi. Metallfletningen 28 er sluttet til en sender eller mottaker ved hjelp av en koaksial-kabel 40, hvis innerleder ved 42 er sluttet til metallfletningens 28 nedre ende og hvis sylindriske ytterleder er sluttet tLl gjennomfor-ingsstedet i rorets 22 nedre del. Kabelen 40 strekker seg foruten gjennom roret 22 også gjennom åpninger i skiven 14, bunnplaten og gjennom bæreroret 10. - The antenna is placed on a holder in the form of a rbr 10, which at its upper end is provided with a flange 12. on the flange 12 is attached a round disk 14> whose lower surface towards the periphery is conically designed to accommodate a number of counterweight elements 16, which is screwed onto the disc 14 and easily replaceable for i.a. to facilitate the transport, assembly and maintenance of the antenna as well as for possibly changing the antenna's wavelength range. The counterweight elements 15 conveniently consist of small number cylinders closed on all sides and are galvanically connected to the earthed carrier bridge 10. At its upper end, the disc 14 is provided with a centric and round outlet 18, into which is inserted a bottom plate 20, which is fixed by means of screws which goes through holes in the disk 14 and into the base 18. A metallic cylinder 22 is attached to the peripheral edge of the base plate 20 and is connected at its upper end to the antenna's radiation element 24. This radiation element is, according to fig. 2 is constructed as a rigid body 26 made of plastic, on which is placed a metal braid 28, which in turn is covered by a layer of plastic 30. A glass fiber mixed polyester plastic is suitable as a type of plastic. The core 26, the metal braid 28 and the outer cover layer 30 are mutually firmly connected and form a completely homogeneous rudder of plastic material, in which the metal braid 28 is embedded. The radiation barrier element 24 has an upper plane circular surface 32 and a cylindrical surface 34 connected to its periphery. The lower end of the radiation element 24 extends into an insulator 36, designed as an annular plate with an upwardly directed peripheral flange 38. The flange 38 protectively grips around the radiation element 24 lower end, the ring plate 36 is attached to the rudder 22 at its inner periphery. The metal braid 28 is connected to a transmitter or receiver by means of a coaxial cable 40, whose inner conductor at 42 is connected to the lower end of the metal braid 28 and whose cylindrical outer conductor is connected to the feed-through point in the lower part of the rudder 22. The cable 40 extends not only through the rudder 22 but also through openings in the disk 14, the bottom plate and through the carrier rudder 10. -
I elektrisk henseende virker strålingselementet 24 som horisontalt-strålende antenne, som mates ved sitt fotpunkt 42, og som p.g.a. sin ganske store diameter i for-hold til lengden har en stor båndbredde. Båndbredden okes ytterligere ved at koaksialresonatoren 22,24 i en viss grad motvirker strålingselementets egen reaktans og virker som koaksialsving-ningskrets, hvis kapasitans kan anses å være lagt innved matnings-punktet 42 og motstående del av roret 22, når man ser bort fra at kapasitansen i realiteten er fordelt langsetter hulrommets 22,24 aksiale lengde, og hvis induktans dannes av flatene 34, In electrical terms, the radiating element 24 acts as a horizontally radiating antenna, which is fed at its base point 42, and which, due to its rather large diameter in relation to its length has a large bandwidth. The bandwidth is further increased by the fact that the coaxial resonator 22, 24 counteracts the radiation element's own reactance to a certain extent and acts as a coaxial oscillation circuit, the capacitance of which can be considered to be placed within the feed point 42 and opposite part of the rudder 22, when one ignores that the capacitance in reality is distributed along the axial length of the cavity 22,24, and if inductance is formed by the surfaces 34,
del av 32 og 22. Koaksialkretsen 22,24 er parallellkoplet med antennens fotpunkt, d.v.s. medforer ytterligere senkning av antennens resonanskurve, d.v.s. okning av båndbredden. Denne koaksialkrets kan også anses å utgjore en kortsluttet kvartbolge-"stub" med lav impedans p.g.a. hoy kretskapasitans og forholds-vis lav kretsinduktans. Antennens strålingselement 24 har gjennom denne anordning en dobbeltfunksjon, idet dets ytterflate samvirker elektromagnetisk med rommet, mens dets innerflate danner en del av en koaksialresonator. Dette medforer ytterligere fordeler utover den store båndbredde, nemlig at antennen blir kompakt og enkel i konstruksjon og at strålingadementet er galvanisk jordet. Dessuten innebærer strålingselementets spesielle utfdr-eise ifolge fig. 2 at konstruksjonslengden av elementet 24 for-kortes ytterligere ved kombinasjonen metallfletning/plast, nemlig p.g.a. plastens dielektrisitetskonstant. Tilslutt er det en fordel at strålingselementet blir lett og heit stabilt samt korrosjonsbestandig, ettersom metallfletningen er innleiret i plast. Man kan også lett tilpasse strålingselementets diameter etter den i elektrisk henseende mest fordelaktige dimensjon, _ part of 32 and 22. The coaxial circuit 22,24 is connected in parallel with the base of the antenna, i.e. entails a further lowering of the antenna's resonance curve, i.e. increase in bandwidth. This coaxial circuit can also be considered to constitute a short-circuited quarter-wave "stub" with low impedance due to high circuit capacitance and relatively low circuit inductance. Through this arrangement, the antenna's radiation element 24 has a dual function, in that its outer surface interacts electromagnetically with the room, while its inner surface forms part of a coaxial resonator. This brings further advantages beyond the large bandwidth, namely that the antenna is compact and simple in construction and that the radiation element is galvanically grounded. Furthermore, the radiation element's special design according to fig. 2 that the construction length of the element 24 is further shortened by the combination of metal braiding/plastic, namely due to the dielectric constant of the plastic. Finally, it is an advantage that the radiation element is light and hot, stable as well as corrosion-resistant, as the metal braid is embedded in plastic. One can also easily adapt the diameter of the radiating element to the most advantageous dimension from an electrical point of view, _
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2801484A DE2801484B2 (en) | 1978-01-13 | 1978-01-13 | Broadband amplifier with an amplifier part and a negative feedback part |
Publications (3)
Publication Number | Publication Date |
---|---|
NO790103L NO790103L (en) | 1979-07-16 |
NO151438B true NO151438B (en) | 1984-12-27 |
NO151438C NO151438C (en) | 1985-04-10 |
Family
ID=6029484
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO790103A NO151438C (en) | 1978-01-13 | 1979-01-12 | BROADBAND AMPLIFIER WITH AN AMPLIFIER PART AND A BACKUP PART |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0003138A1 (en) |
JP (1) | JPS54133051A (en) |
AT (1) | AT377131B (en) |
AU (1) | AU512146B2 (en) |
DE (1) | DE2801484B2 (en) |
DK (1) | DK14179A (en) |
NO (1) | NO151438C (en) |
YU (1) | YU5479A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2484171A1 (en) | 1980-06-04 | 1981-12-11 | Commissariat Energie Atomique | ULTRA-FAST HYBRID LINEAR AMPLIFIER |
DE4426157B4 (en) * | 1994-07-22 | 2004-06-17 | Fuba Communications Systems Gmbh | High-frequency amplifier |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1043432B (en) * | 1954-04-28 | 1958-11-13 | Siemens Ag | Electrical circuit arrangement with semiconductors |
GB1504663A (en) * | 1975-03-03 | 1978-03-22 | Hughes Aircraft Co | Large area hybrid microcircuit assembly |
JPS52149057A (en) * | 1976-06-05 | 1977-12-10 | Nippon Telegr & Teleph Corp <Ntt> | Field effect transister negative feedback amplifier |
-
1978
- 1978-01-13 DE DE2801484A patent/DE2801484B2/en not_active Ceased
-
1979
- 1979-01-11 AT AT0021679A patent/AT377131B/en not_active IP Right Cessation
- 1979-01-11 JP JP105579A patent/JPS54133051A/en active Pending
- 1979-01-11 AU AU43295/79A patent/AU512146B2/en not_active Ceased
- 1979-01-12 YU YU00054/79A patent/YU5479A/en unknown
- 1979-01-12 NO NO790103A patent/NO151438C/en unknown
- 1979-01-12 EP EP79100093A patent/EP0003138A1/en not_active Ceased
- 1979-01-12 DK DK14179A patent/DK14179A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
NO790103L (en) | 1979-07-16 |
EP0003138A1 (en) | 1979-07-25 |
AU512146B2 (en) | 1980-09-25 |
DK14179A (en) | 1979-07-14 |
AT377131B (en) | 1985-02-11 |
AU4329579A (en) | 1979-07-19 |
NO151438C (en) | 1985-04-10 |
JPS54133051A (en) | 1979-10-16 |
DE2801484B2 (en) | 1979-11-08 |
ATA21679A (en) | 1984-06-15 |
DE2801484A1 (en) | 1979-07-19 |
YU5479A (en) | 1982-10-31 |
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